KR100632151B1 - The method of a spot welding and its product thereof - Google Patents

The method of a spot welding and its product thereof Download PDF

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KR100632151B1
KR100632151B1 KR1020050019989A KR20050019989A KR100632151B1 KR 100632151 B1 KR100632151 B1 KR 100632151B1 KR 1020050019989 A KR1020050019989 A KR 1020050019989A KR 20050019989 A KR20050019989 A KR 20050019989A KR 100632151 B1 KR100632151 B1 KR 100632151B1
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welded
spot welding
silicone sealant
spot
applying
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KR1020050019989A
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Korean (ko)
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KR20060099017A (en
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서성창
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서성창
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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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/10—Spot welding; Stitch welding
    • B23K11/11—Spot welding
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/34—Preliminary treatment
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/36—Auxiliary equipment

Abstract

본 발명은 스폿 용접(spot welding) 방법에 관한 것으로, 더욱 상세하게는 두 전극 간에 두 매의 피용접물을 겹쳐서 넣고 가압하면서 필요한 전류를 흘려서 발생되는 저항열에 의해 두 점을 용접하는 스폿 용접에 있어서, 피용접물 사이로 이물질이 들어가지 않게 하거나 상기 피용접물의 용접부분이 수분등에 의해 부식되거나 산화되는 것을 방지하고 수밀, 기밀 유지와 용접면 접착 강도 증가를 위해 피용접물의 한쪽 면에 먼저 실리콘 실란트를 도포한 후 상기 도포된 실리콘 실란트 위에 또 다른 피용접물을 놓고 가압하면서 용접하는 것을 특징으로 하는 스폿 용접 방법에 관한 것이다. The present invention relates to a spot welding method, and more particularly, in spot welding in which two spots are welded by resistance heat generated by flowing a required current while overlapping and pressing two sheets of welded objects between two electrodes, In order to prevent foreign substances from entering between the welded objects or to prevent corrosion of the welded parts of the welded parts by corrosion, etc., and to prevent watertightness and airtightness, and to increase the weld surface adhesion strength, a silicone sealant is first applied to one side of the welded object. Then, the present invention relates to a spot welding method, wherein welding is performed while placing another to-be-welded object on the coated silicone sealant.

스폿 용접, 실리콘 실란트, 전극 접촉면, 피용접물, 용접부분 Spot welding, silicone sealant, electrode contact surface, welded object, welded part

Description

스폿 용접 방법 및 그 용접물{The method of a spot welding and its product thereof}Spot welding method and its weldment {The method of a spot welding and its product about}

도 1은 피용접물을 스폿 용접하는 전극의 단면도1 is a cross-sectional view of an electrode for spot welding a welded object;

도 2는 본 발명에 의해 실리콘 실란트가 도포된 피용접물의 사시도2 is a perspective view of a welded body to which a silicone sealant is applied according to the present invention;

도 3는 본 말명의 스폿 용접 방법에 의한 피용접물의 단면도3 is a cross-sectional view of the object to be welded by the spot welding method of the present invention.

도 4는 종래의 스폿 용접 방법에 의한 피용접물의 단면도4 is a cross-sectional view of a welded object by a conventional spot welding method.

도 5은 종래의 스폿 용접 방법에 의해 제조된 실리콘 실란트가 도포된 피용접물의 사시도5 is a perspective view of a welded surface to which a silicone sealant is manufactured by a conventional spot welding method.

<도면의 주요 부분에 대한 부호의 설명>      <Explanation of symbols for the main parts of the drawings>

1a, 1b. 전극 2a, 2b. 전극팁1a, 1b. Electrodes 2a, 2b. Electrode tip

3a, 3b, 3a', 3b'. 피용접물 4, 4'. 실리콘 실란트3a, 3b, 3a ', 3b'. Weld 4, 4 '. Silicone sealant

5a, 5b, 5c, 5d, 5a', 5b', 5c', 5d'. 전극 접촉면 5a, 5b, 5c, 5d, 5a ', 5b', 5c ', 5d'. Electrode contact surface

6a, 6b, 6a', 6b'. 용접부분6a, 6b, 6a ', 6b'. Welding part

본 발명은 스폿 용접(spot welding) 방법에 관한 것으로, 더욱 상세하게는 두 전극 간에 두 매의 피용접물을 겹쳐서 넣고 가압하면서 필요한 전류를 흘려서 발생되는 저항열에 의해 두 점을 용접하는 스폿 용접에 있어서, 피용접물 사이로 이물질이 들어가지 않게 하거나 상기 피용접물의 용접부분이 수분 등에 의해 부식되거나 산화되는 것을 방지하고 수밀, 기밀 유지와 용접면 접착 강도 증가를 위해 피용접물의 한쪽 면에 먼저 실리콘 실란트를 도포한 후 상기 도포된 실리콘 실란트 위로 또 다른 피용접물을 놓고 가압하면서 용접하는 것을 특징으로 하는 스폿 용접 방법에 관한 것이다.  The present invention relates to a spot welding method, and more particularly, in spot welding in which two spots are welded by resistance heat generated by flowing a required current while overlapping and pressing two sheets of welded objects between two electrodes, In order to prevent foreign matter from entering between the welded material or to prevent corrosion of the welded part of the welded material by corrosion or oxidation, and to seal the watertightness, airtightness and increase the adhesive strength of the welded surface, silicone sealant is first applied to one side of the welded material. And a spot welding method characterized by welding while placing another welded object on the coated silicone sealant and pressing.

일반적으로 스폿 용접(spot welding)은 리벳이음과 같이 피용접물에 구멍을 뚫지 않고 피용접물의 점접합을 행하는 용접으로써, 전극 사이에 용접하고자 하는 두 매의 피용접물을 끼우고 가압하면서 전류를 흘려서 그 접촉부의 저항열로 가압부를 융합시키는 방법이다. 종래의 스폿 용접은 저탄소강, 고탄소강, 저합금강, 알루미늄 합금, 스테인레스강, 주석도금판등 각종 금속들이 사용되고 있으며 용접 후 겹쳐진 피용접물 사이로 이물질이나 수분이 들어가는 것을 방지하기 위하여 실리콘 실란트를 용접된 부분 위에 도포하는 방법이 이용되었다.In general, spot welding is a spot welding of a welded object, such as a riveted joint, without puncturing the welded object. A spot welding is performed by inserting and pressurizing two welded objects to be welded between electrodes. It is a method of fusing a pressurization part by resistance heat of a contact part. Conventional spot welding uses a variety of metals such as low carbon steel, high carbon steel, low alloy steel, aluminum alloy, stainless steel, tin plate, etc., and welds the silicone sealant to prevent foreign substances or moisture from entering between overlapping welds after welding. The method of coating on was used.

그러나 상기한 종래의 스폿 용접 방법은 도 4, 도 5에 도시된 바와 같이 용접된 외측면 위의 도포된 실리콘 실란트(4')가 피용접물(3a')(3b')로부터 떨어져 나갈 수 있으며, 또한 실리콘 실란트(4')로 도포된 용접부분(6a')(6b') 사이로 이물질이 들어가거나 상기 용접부분(6a')(6b')이 수분 등에 의해 부식이 되어 피용접물(3a')(3b')이 쉽게 분리될 수 있는 문제점이 있었다.However, in the conventional spot welding method described above, the coated silicone sealant 4 'on the welded outer surface as shown in Figs. 4 and 5 can be separated from the welded object 3a' and 3b ', In addition, foreign matter enters between the welded portions 6a 'and 6b' coated with the silicone sealant 4 'or the welded portions 6a' and 6b 'are corroded by moisture or the like. 3b ') has a problem that can be easily separated.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 스폿 용접하기 전에 실리콘 실란트를 피용접물 사이에 도포한 후 스폿 용접을 함으로써 용접부분의 분리나 부식등의 문제점을 방지하고 수밀, 기밀을 유지 하는데 목적이 있다.The present invention is to prevent the problems such as separation or corrosion of the welded portion and to maintain watertightness and airtightness by applying a silicone sealant between the welded object and then spot welding in order to solve the above problems of the prior art. There is this.

이러한 목적을 달성하기 위하여 스폿 용접을 하기 전에 피용접물의 용접될 한쪽 면 위에 실리콘 실란트를 도포한 후 상기 도포된 실리콘 실란트가 건조되기 전에 또 다른 피용접물을 상기 실리콘 실란트 위에 겹쳐서 스폿 용접을 함으로써, 피용접물로부터 실리콘 실란트가 떨어져 나가거나 또는 실리콘 실란트로 도포된 용접부분 사이로 이물질이 들어가거나 수분 등에 의해 부식이 되어 피용접물이 쉽게 분리되는 문제점을 방지하고 수밀, 기밀을 유지할 수 있는데 본 발명의 특징이 있다.In order to achieve this purpose, by applying a silicone sealant on one side of the workpiece to be welded before spot welding, and then spot welding by overlapping another welded object on the silicone sealant before the applied silicone sealant is dried, The silicone sealant is separated from the welded material or foreign matter enters between the welded parts coated with the silicone sealant, which is corroded by moisture, and the like, thereby preventing the problem of easily separating the welded object and maintaining watertightness and airtightness.

본 발명의 스폿 용접 방법은 피용접물의 용접될 면 위에 실리콘 실란트를 도포한 후 상기 도포된 실리콘 실란트가 건조되기 전에 또 다른 피용접물을 상기 도포된 실리콘 실란트 위에 겹쳐 놓고 스폿 용접기의 두 전극 간에 상기 겹쳐진 두 매의 피용접물을 넣고 가압하면서 필요한 전류를 흘려 발생되는 저항열에 의해 두 점을 용접하는 것이다.The spot welding method of the present invention applies a silicone sealant on the surface to be welded to the welded surface, and then, before the coated silicone sealant is dried, another welded object is overlaid on the applied silicone sealant and the overlap between the two electrodes of the spot welder. The two welding points are welded by the resistance heat generated by inserting and pressurizing two pieces of welded materials.

이하 본 발명의 스폿 용접 방법을 도 1 내지 도 3에 도시된 바에 의하여 더욱 상세하게 설명하면 다음과 같다.Hereinafter, the spot welding method of the present invention will be described in more detail with reference to FIGS. 1 to 3.

먼저 도 2에서 도시된 바와 같이 피용접물(3b) 상의 용접될 한쪽 면에는 0.1 ~ 0.5mm 두께로 실리콘 실란트(4)를 도포하는데, 필요에 따라 상기 실리콘 실란트 (4)의 도포는 더 두껍게 하거나 또는 얇게 할 수 있으며 상기 실리콘 실란트(4)를 도포함으로써 용접부분(6a)(6b)이 부식 또는 산화되는 것을 방지하고 피용접물 (3a)(3b) 사이에 이물질이 들어가는 것을 방지하며 수밀, 기밀 유지와 용접면 접착 강도가 증가된다.First, as shown in FIG. 2, a silicone sealant 4 is applied to one side to be welded on the welded object 3b to a thickness of 0.1 to 0.5 mm, and the application of the silicone sealant 4 is made thicker if necessary. It can be thinned and the silicone sealant 4 is applied to prevent corrosion or oxidation of the welded portions 6a and 6b and to prevent foreign matter from entering between the welded portions 3a and 3b. Weld surface adhesive strength is increased.

상기 피용접물(3a)(3b)에는 저탄소강, 고탄소강, 저합금강, 알루미늄과 알루미늄 합금, 스테인레스강, 주석도금판등 각종 금속들이 사용된다. In the welded object 3a and 3b, various metals such as low carbon steel, high carbon steel, low alloy steel, aluminum and aluminum alloy, stainless steel, and tin plate are used.

또한 실리콘 실란트(4)는 대부분의 산업 분야에서 필수적으로 사용되는 고기능의 재료로서 공기중에 노출이 되거나 온도가 내려가면 금방 고체로 변하는 성질이 있는 것으로서 각종 접합부(joint)나 갈라진 틈(seam)에 대한 수밀, 기밀을 유지하기 위하여 충진되는 물질로 이는 어느 정도 강도 및 탄성을 가지고 부재를 고정시켜 건축물 또는 자동차 새시(sash)등의 내구성을 증진시키는 목적으로 사용되며 일액형은 주제와 경화제가 이미 한 개의 용기에 혼합되어 있어 현장에서 바로 사용할 수 있도록 포장된 제품을 말하고, 이액형은 주제와 경화제가 별도의 용기에 포장되어 있어 사용 전 혼합하여 사용하는 제품을 말하는데, 본 발명에서는 실리콘 실란트(4)로 다우코닝사에서 제조된 일액형의 다목적 비초산형 뉴트럴 플러스(Neutral Plus) 실리콘 실란트(상표명)를 사용하였다.In addition, the silicone sealant (4) is a high-performance material that is essentially used in most industrial fields, and becomes a solid quickly when exposed to air or when the temperature decreases. Therefore, the silicone sealant (4) is used for various joints or cracks. It is a material filled to maintain watertightness and airtightness. It is used for the purpose of improving durability of building or automobile sash by fixing the member with some strength and elasticity. Refers to a product that is mixed in a container and packaged for immediate use in the field, and the two-part type refers to a product that is mixed and used before use because the main body and the curing agent are packaged in a separate container. One-component, multi-purpose, nonacetic neutral plus silicone sealant manufactured by Dow Corning The patients) were used.

다음으로 상기 실리콘 실란트(4)가 도포된 피용접물(3b) 위에 또 다른 피용접물(3a)을 겹쳐서 놓은 후, 도 1에서와 같이 겹쳐진 두 매의 피용접물 (3a)(3b)을 스폿 용접기의 두 전극(1a)(1b)의 전극팁(2a)(2b) 사이에 넣고 가압하면서 전류를 흘려서 그 접촉부의 저항열로 가압부를 융합시킨다. 상기 스폿 용접기의 두 전극(1a)(1b)에 의해 가압되어 융합된 피용접물(3a)(3b)에는 안쪽으로 함몰된 전극 접촉면(5a)(5b)(5c)(5d)이 형성되며, 상기 전극 접촉면(5a)(5b)(5c)(5d) 안쪽에는 용접부분(6a)(6b)이 형성되고, 상기 전극(1a)(1b)은 통전 역할 뿐 아니라 압력을 가해 주어야 하므로 전기 및 열전도성이 양호하며 경도가 큰 동합금이 이용된다.Next, the other to-be-welded material 3a is piled up on the to-be-welded material 3b to which the said silicone sealant 4 was apply | coated, and two sheets of to-be-welded material 3a, 3b as shown in FIG. An electric current flows while being pressed between the electrode tips 2a and 2b of the two electrodes 1a and 1b, and the pressurized portion is fused by the heat of resistance of the contact portion. Electrode contact surfaces 5a, 5b, 5c and 5d recessed inwardly are formed on the welded objects 3a and 3b which are pressed and fused by the two electrodes 1a and 1b of the spot welder. Welding portions 6a and 6b are formed inside the electrode contact surfaces 5a, 5b, 5c and 5d, and the electrodes 1a and 1b are electrically and thermally conductive because they need to apply pressure as well as conduction. This good copper alloy with high hardness is used.

상기 스폿 용접 방법에 의하여 형성된 피용접물(3a)(3b)은 도 3에 도시된 바와 같이 실리콘 실란트(4)가 피용접물(3a)(3b) 사이에 도포된 상태에서 스폿 용접되어 피용접물(3a)(3b)이 더욱 단단하게 결합된 상태를 유지하며 방수 및 용접부분 (6a)(6b)의 산화를 방지하게 된다.The welded objects 3a and 3b formed by the spot welding method are spot welded in the state where the silicone sealant 4 is applied between the welded objects 3a and 3b as shown in FIG. 3b is more tightly coupled and prevents the waterproofing and oxidation of the welded portions 6a and 6b.

상기한 바와 같이 종래의 스폿 용접 후 실리콘 실란트를 도포하는 방법에 의하면 피용접물 사이로 이물질이 들어가거나 상기 피용접물의 용접부분이 수분 등에 의해 부식되는 문제점이 발생하였는 바, 본 발명에 의하면 피용접물로부터 실리 콘 실란트가 떨어져 나가거나 또는 피용접물 사이에 이물질이 들어가지 않고, 실리콘 실란트로 도포된 용접부분이 수분 등에 의해 부식이 되는 것을 방지하며 수밀, 기밀 유지와 용접면 접착 강도가 증가되는 효과가 있다. As described above, according to the conventional method of applying a silicone sealant after spot welding, a problem arises in which foreign matter enters between the welded objects or corrosion of the welded portion of the welded material due to moisture. Cone sealant is separated or foreign matter does not enter between the welded object, and the welded portion coated with the silicone sealant is prevented from being corroded by moisture, etc., and watertightness, airtightness and weld surface adhesive strength are increased.

Claims (3)

두매의 피용접물 사이에 실리콘계 수지의 도포제를 도포한 후 도포제가 건조되기 전에 스폿 용접기의 두 전극 간에 상기 피용접물들을 넣고 가압하면서 전류를 흘려 발생되는 저항열에 의해 두 점을 용접하는 스폿 용접 방법에 있어서, 금속 재질로 이루어진 피용접물(3b)의 용접될 면 위에 실리콘 실란트(4)를 도포한 후 다른 피용접물(3a)을 상기 실리콘 실란트(4) 위에 겹쳐 놓은 상태에서 스폿 용접하는 것을 특징으로 하는 스폿 용접 방법.In the spot welding method of applying a coating agent of a silicone-based resin between the two to-be-welded materials, and then welding the two points by the heat of resistance generated by flowing a current while putting the to-be-welded materials between the two electrodes of the spot welder before the coating agent is dried. The spot is characterized by applying a silicone sealant (4) on the surface to be welded of the metal to be welded (3b), and then spot welding the other to-be-welded material (3a) on the silicon sealant (4) welding method. 삭제delete 두매의 피용접물 사이에 실리콘계 수지의 도포제를 도포한 후 도포제가 건조되기 전에 스폿 용접기의 두 전극 간에 상기 피용접물들을 넣고 가압하면서 전류를 흘려 발생되는 저항열에 의해 용접되는 스폿 용접물에 있어서, 금속 재질로 이루어진 피용접물(3b)의 용접될 면 위에 실리콘 실란트(4)를 도포한 후 다른 피용접물(3b)을 상기 실리콘 실란트(4) 위에 겹쳐 놓고 스폿 용접하여 제조된 것을 특징으로 하는 스폿 용접물.In a spot weld welded by a resistance heat generated by applying an electric current while applying pressure between the two electrodes of a spot welder after applying a coating agent of a silicone-based resin between two to-be-welded materials and then drying the coated material between the two electrodes of the spot welder. Spot welds, characterized in that by applying a silicone sealant (4) on the surface to be welded made of the welded object (3b) made by overlapping the other welded object (3b) on the silicon sealant (4) and spot welding.
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