KR101665873B1 - Welding apparatus - Google Patents

Welding apparatus Download PDF

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Publication number
KR101665873B1
KR101665873B1 KR1020150078577A KR20150078577A KR101665873B1 KR 101665873 B1 KR101665873 B1 KR 101665873B1 KR 1020150078577 A KR1020150078577 A KR 1020150078577A KR 20150078577 A KR20150078577 A KR 20150078577A KR 101665873 B1 KR101665873 B1 KR 101665873B1
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KR
South Korea
Prior art keywords
shaft
cooling fluid
welding
cooling
fusion
Prior art date
Application number
KR1020150078577A
Other languages
Korean (ko)
Inventor
유성균
Original Assignee
주식회사 포스코
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Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150078577A priority Critical patent/KR101665873B1/en
Application granted granted Critical
Publication of KR101665873B1 publication Critical patent/KR101665873B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/703—Cooling arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/003—Cooling means

Abstract

The present invention relates to a welding apparatus to prevent fusion of spatters generated during welding, comprising: a base frame to which a base material is transferred; a welding head disposed on the base frame to weld the base material; and a pressure roller rotatably installed in the base frame to press a welding part while rolling, and bringing in contact with the welding part formed with a fusion prevention layer such that a spatter generated during welding is not fused to a surface. With such a configuration, the present invention is capable of obtaining an effect of preventing fusion of a spatter by forming a fusion prevention layer having a high melting point on one surface located on a side surface to be welded by the pressure roller.

Description

[0001] WELDING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a welding apparatus, and more particularly, to a welding apparatus for preventing fusion of a spatter generated during welding.

Generally, in order to continuously produce products in the cold rolling process, the leading and trailing coils are automatically welded at the process inlet side. At this time, a laser welding apparatus is used as a facility for welding the preceding coil and the trailing coil.

1 is a view schematically showing a conventional laser welding apparatus.

1, the laser welding apparatus 1 includes a base frame 10 to which a coil C is to be transferred, a base frame 10 disposed on the base frame 10 to be positioned on the coil C to be transported, A wire feeder 30 for supplying a welding wire to the welded portion of the coil C and a wire feeder 30 connected to the base frame 10 to rotate the coil C , And a gas nozzle 50 for supplying an inert gas to the welded portion.

The pressing roller 40 presses and supports the coil C so that welding can be performed without deformation when the coil C is welded. The spatter generated when welding is applied to the pressing roller 40 There is a problem that welding quality is lowered due to continuous fusion.

That is, the spatter is continuously fused to the rotating pressure roller 40 and interference occurs with the wire supplying unit 30 and the gas nozzle 50, thereby changing the supply direction of the wire and the gas, There is a problem that occurs.

It is an object of the present invention to provide a welding apparatus for forming a welding prevention layer so that a spatter generated during welding is not welded to a pressure roller.

In order to accomplish the above object, a welding apparatus according to a preferred embodiment of the present invention includes: a base frame to which a base material is transferred; A welding head disposed in the base frame and welding the base material; And a pressure roller which is installed to rotate on the base frame so as to press the welding part while rolling contact with the welding part of the base material and in which a fusion prevention layer is formed so that the spatter generated during welding is not fused to the surface.

The pressing roller includes a body which is fastened to a shaft rotatably installed on the base frame and presses and rotates the base material; And a fusion prevention layer formed on one side of the body so as to be positioned on the welding head side, the fusion prevention layer being made of a material having a higher melting point than the body.

The fusing prevention layer may be formed in the receiving groove formed in the body.

In addition, the receiving groove portion may be provided such that the cross-sectional area of the receiving groove portion is increased toward the inner side from the outer edge to increase the bonding strength of the fusion prevention layer.

Furthermore, a plurality of grooves may be formed in the receiving groove to increase the contact area between the fusion prevention layer and the body.

A cooling fluid passage through which the cooling fluid flows in the body for cooling the body is formed and a cooling fluid is supplied to the body through the cooling fluid passage of the body and an external cooling fluid supply line, A connecting flow path may be formed.

The fusing prevention layer may be formed of a copper alloy material which is formed by overlay bending welding and is a superconductor.

According to the welding apparatus of the present invention, it is possible to obtain the effect of preventing the fusion of the spatter by forming a fusion prevention layer having a high melting point on one surface located on the side where the pressure roller is welded.

1 is a schematic view of a conventional laser welding apparatus,
2 is a perspective view schematically showing a first embodiment of a pressure roller in a welding apparatus according to the present invention,
FIG. 3 is a cross-sectional view schematically showing the AA 'region of FIG. 2,
4 is a cross-sectional view schematically showing a second embodiment of a pressure roller in a welding apparatus according to the present invention,
FIG. 5 is a cross-sectional view schematically illustrating the BB 'region of FIG. 4,
6 is a perspective view schematically showing a third embodiment of the pressure roller in the welding apparatus according to the present invention,
FIG. 7 is a cross-sectional view schematically showing the CC 'region of FIG. 6 by cutting.

In order to facilitate understanding of the features of the present invention, a welding apparatus according to an embodiment of the present invention will be described in more detail.

It should be noted that, in order to facilitate understanding of the embodiments described below, reference numerals are added to the constituent elements of each of the accompanying drawings, and the same constituent elements are denoted by the same reference symbols whenever possible . In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

The welding apparatus according to the present invention is provided in the same configuration as the laser welding apparatus 1 shown in Fig. 1, and only the pressing roller differs. Therefore, the same structure as the conventional one will be described with reference to FIG. 1, and the pressing roller according to the embodiment of the present invention will be described in detail with reference to FIG. 2 to FIG.

A welding apparatus according to the present invention includes a base frame 10 to which a base material C is transferred, a welding head 20 disposed on the base frame 10 to weld the base material C, And a pressure roller (200) rotatably installed on the base frame (10) so as to press the welding part while being in rolling contact with the welding part of the welding part and formed with a spark preventing layer (300) do.

FIG. 2 is a perspective view schematically showing a first embodiment of a pressure roller in a welding apparatus according to the present invention, and FIG. 3 is a cross-sectional view schematically showing a section taken along line A-A 'of FIG.

2 and 3, the pressure roller 200 according to the first embodiment of the present invention includes a body (not shown) which is fastened to a shaft (not shown) And a fusion prevention layer 300 formed on one side of the body 210 so as to be positioned on the welding head side. The fusion prevention layer 300 is formed of a material having a melting point higher than that of the body 210.

The pressing roller 200 is provided in a pair, and the welding head is disposed between the pair of pressing rollers. When the pressing roller 200 is in rolling contact with the welding part of the base material on which the pressing roller 200 moves, So that the material and the material for welding are brought into close contact with each other.

The body 210 of the pressure roller 200 is formed in a disk shape and a fastening hole 211 is formed so that a shaft can be inserted and fastened to the center.

The fusing prevention layer 300 is formed on one surface of the body 210 facing the welding head to prevent the spatter from being welded to the body 210 during welding.

It is preferable that the fusion prevention layer 300 is formed by overlay growth welding. The fusing prevention layer 300 is not limited to the fusing prevention layer 300. The fusing prevention layer 300 may have a separate structure and may be provided on the body 210 by mechanical fastening such as screwing.

The fusion prevention layer 300 is preferably made of a copper alloy material, which is a superconductor. For example, copper or copper alloy such as copper (Cu), chromium alloy copper (CrCu), or chromium zirconium copper (CrCuZr). Of course, the material of the fusing prevention layer 300 is not limited thereto, and any material that does not melt the spatter generated during welding may be provided.

Here, the body 210 has a receiving groove 212 extending inwardly from the outer surface of the fusion preventing layer 300 to increase the bonding strength of the fusion preventing layer 300 formed on one surface. That is, as shown in FIG. 3, the receiving groove 212 is formed so that both side surfaces thereof are tapered.

In this configuration, when the fusing prevention layer 300 is formed on the surface of the body 210, a part of the fusing prevention layer 300 is structurally inserted and fixed in the receiving recess 212, In addition, since the bonding force between the body 210 and the fusion prevention layer 300 is reduced, the fusion prevention layer 300 can be prevented from falling off.

FIG. 4 is a cross-sectional view schematically showing a second embodiment of a pressure roller in a welding apparatus according to the present invention, and FIG. 5 is a cross-sectional view schematically showing the cutting-off region B-B 'of FIG.

4 and 5, the pressure roller according to the second embodiment of the present invention includes a body 220 coupled to a shaft 400 that is rotatably installed on the base frame, and pressing and rotating the base material, And a fusion prevention layer 300 formed of a material having a melting point higher than that of the body 220 and formed on one surface of the body 220 to be positioned on the welding head side. The apparatus further includes cooling means for cooling the pressure roller heated by the high temperature generated at the welding.

The shaft 400 may be connected to a driving motor (not shown) and rotated at the same speed as the moving speed of the base material C moving on the base frame 10. That is, the pressing roller fastened to the shaft 400 may be rotated so as to be the same as the moving speed of the base material C in a state in which the base material C is pressed.

The temperature of the fusing prevention layer 300 may be lowered by continuously cooling the fusing prevention layer 300 heated by the welding heat through the cooling means, thereby preventing the spatter from being fused more efficiently.

Here, the body 220 is formed in the same shape as the body 210 described in the first embodiment, and has a receiving groove 222 for increasing the bonding strength with the fusion preventing layer 300, Means are additionally provided.

The cooling means includes a cooling channel 223 through which a cooling fluid flows in the body 220 to cool the body 220. The cooling channel 223 is formed in the shaft 400, A connection channel for connecting and disconnecting the cooling fluid to the body 220 is formed by connecting the external cooling fluid supply line 500 and the external cooling fluid supply line 500.

The connection passage of the shaft 400 includes a first connection passage 410 connected to the cooling passage 223 formed in the body 220 to supply the cooling fluid to the cooling passage 223 of the body 220, The second connection channel 420 is connected to the body 220 and discharges the cooling fluid discharged from the body 220 to the outside.

The first and second connection passages 410 and 420 of the shaft 400 are extended such that the side of the body 220 connected to the cooling passage 223 has a larger diameter than the cooling passage 223, . When the shaft 400 is fastened to the body 220, the connection between the first and second connection passages 410 and 420 of the shaft 400 and the cooling passage 223 of the body 220, Error can be reduced.

The cooling passage 223 may be formed in the body 220 and may pass through the entire surface of the body 220. As shown in FIG. 5, the cooling passage 223 is formed in a zigzag shape so as to swing the radius of the body 220 and to swing the remaining radial portion to flow on the front surface of the body 220 . Of course, the shape of the cooling passage 223 is not limited to this, but may be provided in any known form capable of cooling the front surface of the body 220 efficiently.

4, a cooling fluid supply line 500 connected to the first connection path 410 and a cooling fluid discharge line 600 connected to the second connection path 420 are connected to the rotation of the shaft 400 A cooling fluid collecting part 620 provided on the shaft 400 and an adapter 610 connecting the second connecting flow path 420 and the cooling fluid collecting part 620 are provided to prevent twisting .

The first connection passage 410 is formed on the central axis of the shaft 400 and is connected to the cooling fluid supply line 500. At this time, a connection portion rotatable between the first connection passage 410 and the cooling fluid supply line 500 is provided to prevent the cooling fluid supply line 500 from being twisted even if the shaft 400 rotates . Any connection configuration known in the art may be applied to the connection portion for this purpose.

The first protrusion 611 is connected to one end of the flow path and is protruded to the outside of the second connection channel 420, And the second protrusion 612 connected to the other end of the flow path and protruding to the outside is protruded out so as to be parallel to the rotation axis of the shaft 400. [ The adapter 610 is coupled to the shaft 400 and rotates together with the shaft 400.

The cooling fluid collecting unit 620 is disposed in the base frame 10 and has a center through which the shaft 400 is inserted. The cooling fluid collecting unit 620 includes a bearing (630).

The cooling fluid collecting unit 620 may include a ring-shaped guide hole 623 formed at one side thereof in correspondence with the movement path of the second protrusion 612 formed by rotating together with the shaft 400, The second projection 612 of the adapter 610 is inserted. That is, the second protrusion 612 is inserted into the guide hole 623, and the second protrusion 612 always contacts the guide hole 623 even when the adapter 610 rotates together with the shaft 400. [ As shown in Fig.

The hollow portion 621 is connected to the guide hole 623 and is discharged to the second projection 612. The hollow portion 621 of the cooling fluid collecting portion 620 has a hollow portion 621, Is stored. The cooling fluid discharge line 600 is connected to the discharge hole 623 formed at one end of the cooling fluid collecting part 620 to discharge the cooling fluid stored therein.

With this configuration, even when the shaft 400 rotates, the cooling fluid supply line 500 and the cooling fluid discharge line 600, which are connected to the first connection path 410 and the second connection path 420, respectively, The phenomenon can be prevented.

Of course, the above-described configuration for preventing the cooling fluid supply line 500 and the cooling fluid discharge line 600 connected to the shaft 400 from being twisted by the rotation of the shaft 400 is only one embodiment , And can be applied to any method that can be easily configured by a person skilled in the art.

FIG. 6 is a perspective view schematically showing a third embodiment of the pressure roller in the welding apparatus according to the present invention, and FIG. 7 is a cross-sectional view schematically showing the section C-C 'of FIG.

6 and 7, the pressure roller according to the third embodiment of the present invention includes a body 230 fastened to a shaft rotatably installed on the base frame and pressing and rotating the base material, And a fusion prevention layer 300 formed on one side of the body 230 so as to be positioned on the welding head side.

The body 230 is provided with an accommodating groove portion 232 having a cross section enlarged inwardly from the outer surface of the fusion preventing layer 300 to increase the bonding force of the fusion preventing layer 300, A plurality of grooves 234 are formed on the inner surface of the fuse prevention layer 300 to widen the contact area with the fuse prevention layer 300.

The body 230 is formed in the same shape as the body 210 described in the first embodiment and includes a receiving groove 232 for increasing the fastening force with the fusion preventing layer 300, The plurality of grooves 234 are additionally provided on the inner surface of the groove portion 232.

As shown in FIG. 6, the grooves 234 may be formed so that a plurality of grooves are formed in the horizontal and vertical directions. Of course, the shape of the groove 234 for widening the contact area between the body 230 and the fusing prevention layer 300 is not limited thereto, but may be variously formed, such as an inclined groove or a plurality of circular grooves.

With such a configuration, the thermal conductivity between the fusion-splicing layer 300 and the body 230 can be increased as the contact area between the body 230 and the fusion-splicing layer 300 becomes wider. Also, there is an effect of increasing the fastening force between the fusion prevention layer 300 and the body 230.

In order to cool the pressurizing roller heated by the high temperature generated during welding, the cooling passage 223 of the body 220 according to the second embodiment is formed in the same manner as the cooling passage 223 of the body 220 described in the second embodiment. A cooling passage 233 through which the cooling fluid flows may also be formed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

C: Base material 10: Base frame
20: welding head 40, 200: pressure roller
210, 220, 230: body 212, 222, 232: receiving groove
223, 233: Cooling channel 300: Fusing prevention layer
400: shaft

Claims (7)

A base frame to which the base material is fed;
A welding head disposed in the base frame and welding the base material;
A fusing prevention layer formed on one side of the body so as to be positioned on the side of the welding head, the fusing prevention layer being made of a material having a melting point higher than that of the body and being rotatably supported by the shaft, A pressure roller formed; And
And cooling means provided in the shaft for cooling the pressure roller by flowing a cooling fluid through a cooling passage formed inside the body,
Wherein the cooling means comprises:
A first connection channel formed in the shaft and connecting a cooling fluid supply line and one end of the cooling channel to supply a cooling fluid;
A second connection channel formed on the shaft, one side of which is connected to the other end of the cooling channel, and the other side of which is formed through the outer circumferential surface of the shaft to discharge the cooling fluid to the outside;
A cooling fluid collecting part arranged to surround the shaft and having a ring-shaped guide hole for allowing the cooling fluid discharged from the second connection path to flow therein; And
An adapter provided on the shaft and having a first protrusion inserted into the other side of the second connection passage and a second protrusion inserted into the guide hole to rotate together with the shaft to discharge the cooling fluid to the cooling fluid collecting part;
.
delete The method according to claim 1,
The fusion-
Wherein the receiving groove portion is formed in the receiving groove portion formed in the body.
The method of claim 3,
Wherein,
Wherein the cross-section is enlarged toward the inner side from the outer edge so as to increase the bonding force of the fusion prevention layer.
The method according to claim 3 or 4,
Wherein a plurality of grooves for increasing a contact area between said fusion prevention layer and said body are further formed in said receiving groove.
delete The method according to claim 1,
The fusion-
Characterized in that the welding apparatus is formed by overlay-up welding and is made of a copper alloy material which is a superconductor.

KR1020150078577A 2015-06-03 2015-06-03 Welding apparatus KR101665873B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180073911A (en) 2016-12-23 2018-07-03 주식회사 포스코 Apparatus and method to welding

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050006919A (en) * 2003-07-10 2005-01-17 현대자동차주식회사 A protecting device for roller of laser optic head
KR101135808B1 (en) * 2003-06-13 2012-04-16 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Ultrasonic horn mount
KR20120042349A (en) * 2010-10-25 2012-05-03 최인수 Guide roller for an auto welding carriage
KR20140061324A (en) * 2014-01-08 2014-05-21 (주)동화웰딩 Welding tip and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101135808B1 (en) * 2003-06-13 2012-04-16 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Ultrasonic horn mount
KR20050006919A (en) * 2003-07-10 2005-01-17 현대자동차주식회사 A protecting device for roller of laser optic head
KR20120042349A (en) * 2010-10-25 2012-05-03 최인수 Guide roller for an auto welding carriage
KR20140061324A (en) * 2014-01-08 2014-05-21 (주)동화웰딩 Welding tip and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180073911A (en) 2016-12-23 2018-07-03 주식회사 포스코 Apparatus and method to welding

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