KR20050119814A - Spot welding method for fuel tank - Google Patents

Spot welding method for fuel tank Download PDF

Info

Publication number
KR20050119814A
KR20050119814A KR1020040044933A KR20040044933A KR20050119814A KR 20050119814 A KR20050119814 A KR 20050119814A KR 1020040044933 A KR1020040044933 A KR 1020040044933A KR 20040044933 A KR20040044933 A KR 20040044933A KR 20050119814 A KR20050119814 A KR 20050119814A
Authority
KR
South Korea
Prior art keywords
spot welding
fuel tank
welding method
tip
electrode tip
Prior art date
Application number
KR1020040044933A
Other languages
Korean (ko)
Other versions
KR100598881B1 (en
Inventor
김상명
오상엽
Original Assignee
(주) 동희산업
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주) 동희산업 filed Critical (주) 동희산업
Priority to KR1020040044933A priority Critical patent/KR100598881B1/en
Publication of KR20050119814A publication Critical patent/KR20050119814A/en
Application granted granted Critical
Publication of KR100598881B1 publication Critical patent/KR100598881B1/en

Links

Classifications

    • 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
    • B23K11/30—Features relating to electrodes
    • 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
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • 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
    • B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/12—Vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Resistance Welding (AREA)

Abstract

본 발명은 연료탱크의 점용접 방법에 관한 것으로서, 플레이트의 양측에서 전극팁이 밀착하여 가압하고 전류를 통하여 상기 플레이트의 사이 접합면에 너겟을 형성하여 접합하는 연료탱크의 점용접 방법에 있어서, 상기 점용접의 전극팁(30)은 그 내부에 절연체가 삽입된 절연팁을 사용하므로, 점용접시의 압흔을 감소시켜 용접부의 외관을 미려하게 하는 한편 크랙을 방지하고 열영향으로 인한 도금층의 파괴 및 열변형을 보완하는 효과가 있다. The present invention relates to a spot welding method of a fuel tank, wherein the electrode tip is pressed in close contact with both sides of a plate, and a spot welding method of a fuel tank in which a nugget is formed on a joint surface between the plates through a current is joined. Since the electrode tip 30 of the spot welding uses an insulating tip having an insulator inserted therein, it reduces the indentation during spot welding to enhance the appearance of the welded part, prevents cracks, and destroys and heats the plating layer due to heat effects. It is effective to compensate for the deformation.

Description

연료탱크의 점용접 방법{spot welding method for fuel tank}Spot welding method for fuel tank

본 발명은 연료탱크의 점용접 방법에 관한 것이다.The present invention relates to a spot welding method of a fuel tank.

일반적으로 연료탱크는 무연수지피복강판 또는 주석 아연 도금강판 등의 원재를 준비하여, 프레스 가공함에 의해 밸브 플레이트와 배플 등과 상부판넬 및 하부판넬을 제조한 다음, 상기 상부판넬의 내부에 상기 밸브 플레이트 및 배플을 프로젝션 용접 및/또는 점용접하여, 상부판넬 중간조립체를 형성한 다음, 이 상부판넬 중간조립체를 세척하여 내부를 깨끗이 한 후, 상기 상부판넬 중간조립체와 하부판넬을 저항 시임용접으로 용접하여, 연료탱크 조립체를 완성하고, 이 연료탱크 조립체에 대한 기밀시험과 마스킹을 실시한 후, 도장공정을 진행한 다음, 최종 조립품을 완료하는 공정으로 제조된다.In general, the fuel tank is prepared from a raw material such as lead-free resin coated steel sheet or tin galvanized steel sheet, and press-processed to produce a valve plate, a baffle, an upper panel and a lower panel, and then the valve plate and the inside of the upper panel. Baffle is projected and / or spot welded to form an upper panel intermediate assembly, and then the upper panel intermediate assembly is washed to clean the inside, and then the upper panel intermediate assembly and the lower panel are welded by resistance seam welding. After the fuel tank assembly is completed, the airtight test and masking of the fuel tank assembly are carried out, the coating process is performed, and then the final assembly is manufactured.

한편, 종래 연료탱크 용량과 서스펜션 프레임을 비롯한 리어 서스펜션 일체, 그리고 실내 거주공간등을 고려한 후부 플로어 등의 설계시 위치와 공간 등에 제약을 받아 항상 절충선에서 설계가 이루어지므로 설계의 한계를 제약받는 문제점이 있고 또한 연료탱크와 서스펜션 프레임은 별도의 부품이고 공간의 한 부분을 각각 차지하지만 연료탱크가 차지하는 공간은 연료를 채우는데 이용되지만 서스펜션 프레임의 내부 공간은 무용한 공간이 되어 불필요하게 공간만을 차지하여 공간활용을 극대화시킬 수 없고 경량화 및 원가절감의 효과를 기대할 수 없었다. 이러한 문제점을 해결하기 위해 최근에는 연료탱크와 서스펜션 프레임을 일체형으로 제작하는 공법이 제시되어, 연료탱크의 하부 프레임과 서스펜션 프레임을 점용접으로 접합한 후, 상기 연료탱크의 상, 하부 프레임을 시임용접으로 용접하는 연료탱크를 완성하게 된다.On the other hand, there is a problem that the design is limited at the compromise line because it is always restricted by the position and space when designing the rear suspension including the fuel tank capacity, the suspension frame, the rear suspension, and the indoor living space. In addition, the fuel tank and the suspension frame are separate parts and occupy a part of the space, but the space occupied by the fuel tank is used to fill the fuel, but the inner space of the suspension frame becomes useless space and occupies only the space unnecessarily. The space utilization could not be maximized and the effect of light weight and cost reduction could not be expected. In order to solve this problem, a method of manufacturing the fuel tank and the suspension frame in one piece has recently been proposed. After the lower frame and the suspension frame of the fuel tank are joined by spot welding, the upper and lower frames of the fuel tank are seam welded. The fuel tank to be welded is completed.

종래, 이와 같은 연료탱크의 제조공정 중에 행해지는 점용접은 도1에 도시한 바와 같이 접합되는 두 개의 플레이트(2, 4)의 양측면에 전극팁(6 : cap tip)을 밀착시켜 전류를 통과시킴에 의해 행하게 된다. 상기 전극팁(6)은 그 단부가 라운드 형태로 되어 있다.Conventionally, the spot welding performed during the manufacturing process of such a fuel tank allows the electrode tip 6 to be brought into close contact with both sides of the two plates 2 and 4 joined as shown in FIG. It is done by. The electrode tip 6 has a rounded end portion.

그런데, 종래 연료탱크의 점용접시 도2에 도시한 바와 같이 너겟(N : nugget)을 형성하기 위해 플레이트(2, 4)에 눌려지는 전극팁(6)으로 인해 그 압흔율이 20 ~ 30%에 이르게 되어 연료탱크가 가져야 하는 기밀성과 피로 내구성에 문제를 발생시키는 잠재적인 불안요인이 되고, 특히, 연료탱크의 하부 프레임과 서스펜션 프레임을 점용접으로 접합할 경우에는 재질이 다르고 두께 차이가 큰 플레이트를 접합하게 되므로 기밀성과 피로 내구성에 큰 문제점을 야기하게 된다.However, in spot welding of a conventional fuel tank, the indentation rate is 20 to 30% due to the electrode tips 6 pressed by the plates 2 and 4 to form nuggets as shown in FIG. This leads to potential anxiety that causes problems in airtightness and fatigue durability of the fuel tank. In particular, when welding the lower frame and suspension frame of the fuel tank by spot welding, a plate having a different material and a large thickness difference is used. Bonding causes major problems in airtightness and fatigue durability.

따라서, 본 발명은 상기 문제점을 해결하기 위해 이루어진 것으로서, 본 발명의 목적은 점용접시의 압흔을 감소시켜 용접부의 외관을 미려하게 하는 한편 크랙을 방지하고 열영향으로 인한 도금층의 파괴 및 열변형을 보완하는 연료탱크의 점용접 방법을 제공하는데 있다.Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to reduce the indentation during spot welding to make the appearance of the weld beautiful while preventing cracks and to compensate for the breakage and thermal deformation of the plating layer due to heat effects It is to provide a spot welding method of the fuel tank.

본 발명에 의한 연료탱크의 점용접 방법은, 플레이트의 양측에서 전극팁이 밀착하여 가압하고 전류를 통하여 상기 플레이트의 사이 접합면에 너겟을 형성하여 접합하는 연료탱크의 점용접 방법에 있어서, 상기 점용접의 전극팁은 그 내부에 절연체가 삽입된 절연팁을 사용하는 것을 특징으로 한다.In the spot welding method of a fuel tank according to the present invention, in the spot welding method of a fuel tank in which the electrode tips are pressed against both sides of the plate and pressurized, and a nugget is formed on the joining surface between the plates through a current. The electrode tip of the welding is characterized by using an insulating tip inserted therein.

상기 절연팁은 그 절연체의 중앙이 트여 목을 형성함에 의해 전류밀도를 높이게 되어 있다.The insulating tip is made to increase the current density by opening the center of the insulator to form a neck.

상기 플레이트 사이 접합면에는 방진 및 방청성을 높이고 용접으로 인한 열변형을 방지하는 열경화성 접합제를 개재하여 용접한다.The joining surface between the plates is welded through a thermosetting bonding agent that increases dust and corrosion resistance and prevents heat deformation due to welding.

상기 열경화성 접합제는 에폭시수지 45 ~ 65 중량%, 탄산칼슘 18 ~ 32 중량%, 카본 5 ~ 15 중량%, 산화칼슘 2 ~ 6 중량%를 포함하고 있는 것이 바람직하다.The thermosetting binder preferably contains 45 to 65% by weight of epoxy resin, 18 to 32% by weight of calcium carbonate, 5 to 15% by weight of carbon, and 2 to 6% by weight of calcium oxide.

이하, 본 발명의 실시예에 대하여 첨부도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도3에 도시한 바와 같이 연료탱크를 이루는 플레이트(24, 26)의 양측에서 전극팁(30)을 밀착하여 가압하고 전류를 통하여 상기 플레이트(24, 26)의 사이 접합면에 너겟(N : nugget, 도4에 도시)을 형성하여 접합하게 되는데, 상기 플레이트(24, 26) 사이 접합면에는 방진 및 방청성을 높이고 용접으로 인한 열변형을 방지하는 열경화성 접합제(28)를 개재하여 용접한다. 그리고, 상기 전극팁(30)은 그 내부에 절연체(32)가 삽입된 절연팁을 사용한다. 상기 절연팁은 그 절연체(32)의 중앙이 트여 목(32a)을 형성함에 의해 전류밀도를 높이게 되어 있다.As shown in FIG. 3, the electrode tips 30 are pressed against both sides of the plates 24 and 26 constituting the fuel tank, and a nugget (N: nugget) is applied to the joint surface between the plates 24 and 26 through a current. 4 is formed to be bonded to each other, and the joining surfaces between the plates 24 and 26 are welded through a thermosetting binder 28 which improves dust and corrosion resistance and prevents heat deformation due to welding. In addition, the electrode tip 30 uses an insulating tip having an insulator 32 inserted therein. The insulating tip is made to increase the current density by opening the center of the insulator 32 to form the neck (32a).

상기 전극팁(30 : 절연팁)은 대체로 원통형으로 되어 있으며, 도5에 도시한 바와 같이 전극 선단의 형상에 따라 F형, R형, D형, DR형 등이 있는데, 용접조건에 따라 그 쓰임이 다르지만 일반적으로 R형과 DR형이 많이 사용된다. The electrode tip 30 (insulation tip) is generally cylindrical, and there are F type, R type, D type, DR type, etc. according to the shape of the electrode tip as shown in FIG. Although different, generally R type and DR type are used.

구체적으로 R형의 경우 팁 선단이 40 ~ 200 mm의 반경 구면이며 구면의 반경에 따라 압흔(눌린 자국)의 깊이가 상이하다. 구면의 반경이 클수록 F형 팁에 가까워져 압흔의 깊이를 감소시킬 수 있는 조건이 되며, F형에 가까워질수록 모재와 전극의 접촉면적이 넓어 표면응력이 낮아진다. 그러나 접촉면적이 넓은 만큼 전류밀도 또한 낮아지게 되어 적정한 너겟(nugget)을 얻기 위해서는 전류가 높아져야 하며 전류가 높아지더라도 용접성은 저하된다.Specifically, in the case of the R-shaped tip tip is a radius sphere of 40 ~ 200 mm and the depth of the indentation (pressed mark) is different depending on the radius of the sphere. The larger the radius of the sphere, the closer to the F-shaped tip, which is a condition to reduce the depth of indentation. The closer to the F-type, the lower the surface stress due to the large contact area between the base material and the electrode. However, the larger the contact area, the lower the current density, so that the current needs to be high in order to obtain an appropriate nugget.

DR형은 D형의 선단에 별도의 직경을 부여한 형태인데, 팁 선단의 직경이 작을수록 전류밀도가 증가하여 뛰어난 용접성을 보인다. 그러나 팁 선단의 직경의 감소는 하중에 대한 표면응력을 높여 압흔의 깊이를 증가시키는 요인이 된다.The DR type is a type in which a separate diameter is given to the tip of the D type, and the smaller the tip diameter is, the more the current density increases, thereby showing excellent weldability. However, the reduction of the tip diameter increases the surface stress against the load, increasing the depth of the indentation.

도6은 본 발명의 점용접 방법에 사용되는 전극팁을 자세히 나타낸 단면도이다. 도시한 바와 같이 본 발명에 사용되는 전극팁(30)은 본체부(31)의 일측 내부에 디스크형의 절연체(32)가 삽입되고 본체부(31)의 타측 내부에 냉각수가 담기는 냉각수 수용부(33)가 형성된 구조이다. 상기 절연체(32)의 중앙은 트여 목(32a)을 형성함에 의해 전류밀도를 높이게 되어, 너겟(nugget)을 형성하게 되어 있다.Figure 6 is a cross-sectional view showing in detail the electrode tip used in the spot welding method of the present invention. As shown in the drawing, the electrode tip 30 used in the present invention has a disc-shaped insulator 32 inserted into one side of the main body 31 and a coolant accommodating part containing coolant in the other side of the main body 31. 33 is a structure formed. The center of the insulator 32 is opened to form a neck 32a to increase the current density, thereby forming a nugget.

상기 절연체(32)는 상기 본체(31)에 흐르는 전류를 상기 목(32a)부분으로만 흐르게 하여 전류밀도를 높여 너겟의 형성을 용이하게 하는 역할을 하며, 상기 냉각수 수용부(33)의 냉각수는 팁의 마모를 줄여 수명을 연장시키는 역할을 한다..The insulator 32 serves to facilitate the formation of the nugget by increasing the current density by flowing a current flowing in the main body 31 to the neck 32a portion, and the coolant of the coolant accommodating portion 33 It reduces the wear of the tip and extends its life.

한편, 도7에 도시한 바와 같이 상기 냉각수 수용부(33)의 저면에는 팁 단부측으로 파인 냉각수 통로(33a)를 형성할 수도 있다. 이러한 냉각수 통로(33a)는 팁 단부의 마모를 더욱 줄이는 효과가 있다.On the other hand, as shown in Fig. 7, a coolant passage 33a which is dug toward the tip end side may be formed on the bottom surface of the coolant accommodating portion 33. Figs. This coolant passage 33a has the effect of further reducing the wear of the tip end.

상기 열경화성 접합제(28 : 접합실러)는 에폭시수지 45 ~ 65 중량%, 탄산칼슘 18 ~ 32 중량%, 카본 5 ~ 15 중량%, 산화칼슘 2 ~ 6 중량%를 포함하는 조성으로 되는 것이 바람직하다. 상기 열경화성 접합제(28)의 전단강도는 160kgf/㎠를 유지하게 된다.The thermosetting binder (28: bonding sealer) is preferably made of a composition containing 45 to 65% by weight epoxy resin, 18 to 32% by weight calcium carbonate, 5 to 15% by weight carbon, 2 to 6% by weight calcium oxide. . The shear strength of the thermosetting binder 28 is to maintain 160kgf / ㎠.

점용접 후에는 상기 열경화성 접합제를 경화시키기 위해 소정온도에서 소정시간동안 건조시키는데, 약 180℃에서 20분간 건조시키면 된다.After spot welding, the thermosetting binder is dried at a predetermined temperature for a predetermined time in order to cure the thermosetting binder, and may be dried at about 180 ° C. for 20 minutes.

도4은 도3의 전극팁 및 열경화성 접합제를 사용하여 용접하는 중의 상태를 나타내는 단면도이다. 도시한 바와 같이 용접전류(I)는 절연체(32)의 중앙부에 형성된 트인부분을 통해 흘러 피용접재에 전도되어, 플레이트(24, 26)의 접합면 사이에서 너깃(N)을 형성하게 되는데, 전극팁(30)에 의한 압흔은 3%이내로서 거의 생기지 않음을 알 수 있다. 즉, 본 발명에 의한 전극팁(30)을 사용하는 경우 전극팁의 중앙에서만 전류가 집중적으로 흐르게 되어 점 용접의 불량의 원인이 되는 스패터의 발생을 최소화하며, 압흔의 흔적을 현저히 감소시키게 되어 압흔으로 인한 플레이트(24, 26)의 크랙을 방지할 수 있다. 그리고 접합면 사이에 개재되는 열경화성 접합제는 용접점의 수를 줄이게 하며 방진, 방청, 방수성을 높이며 용접품질을 향상시키고 피로 내구강성을 증대시킨다.FIG. 4 is a cross-sectional view showing a state during welding using the electrode tip and thermosetting bonding agent of FIG. 3. FIG. As shown in the drawing, the welding current I flows through the open portion formed in the center portion of the insulator 32 and is conducted to the welded material, thereby forming a nugget N between the joint surfaces of the plates 24 and 26. It can be seen that the indentation due to the electrode tip 30 is almost less than 3%. That is, in the case of using the electrode tip 30 according to the present invention, the current flows intensively only in the center of the electrode tip, thereby minimizing the occurrence of spatter, which causes defects in spot welding, and significantly reducing the traces of indentation. Cracks in the plates 24 and 26 due to indentation can be prevented. In addition, the thermosetting bonding agent interposed between the joining surfaces reduces the number of welding spots, improves dustproofing, rustproofing and waterproofing, improves welding quality and increases fatigue resistance.

도8은 본 발명이 적용되는 연료탱크의 하부 패널과 서스펜션 프레임이 점용접으로 접합되는 상태를 나타내는데, 도시한 바와 같이 상기 하부패널(42)과 서스펜션 프레임(44)사이의 접합면에 열경화성 접합제(28)가 띠를 이루며 연속적으로 도포되고, 상기 열경화성 접찹제(28)가 도포된 위치의 중간 중간에서 전극팁으로 점용접하게 된다. 도면에서 점용접의 위치는 P로 표시되어 있다.8 shows a state in which the lower panel and the suspension frame of the fuel tank to which the present invention is applied are bonded by spot welding, and as shown, a thermosetting binder is attached to the bonding surface between the lower panel 42 and the suspension frame 44. 28 is applied continuously in a strip, and spot welding with an electrode tip in the middle of the position where the thermosetting adhesive 28 is applied. In the figure, the position of spot welding is indicated by P.

본 발명의 점용접 방법이 적용된 연료탱크는 점용접으로 인한 압흔이 현저히 감소하므로 외부의 힘에 의한 응력발생시 용접부의 크랙으로 인한 불량이 생기지 않게 되며, 용접시에 발생하는 용접부의 열영향으로 인한 도금층 파괴에 의한 내식성 저하 및 열변형을 상기 열경화성 접합제가 보완하게 된다. In the fuel tank to which the spot welding method of the present invention is applied, the indentation due to spot welding is significantly reduced, so that a defect due to cracks of the weld part does not occur when a stress is generated by an external force, and the plating layer due to the heat effect of the weld part generated during welding. The thermosetting binder compensates for the degradation of corrosion resistance and thermal deformation caused by fracture.

본 발명에 의한 연료탱크의 점용접 방법에 의하면, 점용접시의 압흔을 감소시켜 용접부의 외관을 미려하게 하는 한편 크랙을 방지하고 열영향으로 인한 도금층의 파괴 및 열변형을 보완하고, 특히, 연료탱크의 하부 프레임과 서스펜션 프레임을 점용접으로 접합할 경우에 불량률을 줄이고 연료탱크의 기밀성과 피로 내구성를 높이는 효과가 있다.According to the spot welding method of the fuel tank according to the present invention, the indentation of the spot welding is reduced to enhance the appearance of the welded portion, while preventing cracks and compensating for the destruction and thermal deformation of the plating layer due to the heat effect, in particular, the fuel tank When the lower frame and the suspension frame are joined by spot welding, it reduces the defective rate and increases the airtightness and fatigue durability of the fuel tank.

도1은 종래 전극팁으로 연료탱크를 점용접하는 상태를 나타내는 단면도,1 is a cross-sectional view showing a state of spot welding a fuel tank with a conventional electrode tip;

도2는 도1에서 용접중의 상태를 나타내는 설명도,2 is an explanatory diagram showing a state during welding in FIG. 1;

도3은 본 발명에 의한 전극팁으로 연료탱크를 점용접하는 상태를 나타내는 단면도,3 is a cross-sectional view showing a state of spot welding a fuel tank with an electrode tip according to the present invention;

도4는 도3에서 용접중의 상태를 나타내는 설명도,4 is an explanatory diagram showing a state during welding in FIG. 3;

도5는 본 발명에 사용되는 전극팁의 다양한 형태를 나타내는 개략도,5 is a schematic diagram showing various forms of electrode tips used in the present invention;

도6은 본 발명에 사용되는 전극팁을 상세하게 나타내는 단면도,Figure 6 is a cross-sectional view showing in detail the electrode tip used in the present invention,

도7은 본 발명에 사용되는 전극팁의 다른 예를 상세하게 나타내는 단면도,7 is a cross-sectional view showing another example of the electrode tip used in the present invention;

도8은 본 발명의 점용접 방법이 적용되는 연료탱크와 서스펜션 프레임의 접합상태를 나타내는 사시도이다.8 is a perspective view showing a bonding state between a fuel tank and a suspension frame to which the spot welding method of the present invention is applied.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

24, 26 : 플레이트 28 : 열경화성 접합제24, 26: Plate 28: thermosetting binder

30 : 전극팁 32 : 절연체30: electrode tip 32: insulator

Claims (4)

플레이트의 양측에서 전극팁이 밀착하여 가압하고 전류를 통하여 상기 플레이트의 사이 접합면에 너겟을 형성하여 접합하는 연료탱크의 점용접 방법에 있어서, In the spot welding method of the fuel tank in which the electrode tip is pressed in close contact with both sides of the plate and the nugget is formed by joining between the plates through the electric current, 상기 점용접의 전극팁은 그 내부에 절연체가 삽입된 절연팁을 사용하는 것을 특징으로 하는 연료탱크의 점용접 방법.The electrode tip of the spot welding is a spot welding method of a fuel tank, characterized in that using an insulating tip inserted therein. 제1항에 있어서, The method of claim 1, 상기 절연팁은 그 절연체의 중앙이 트여 목을 형성함에 의해 전류밀도를 높이게 되어 있는 것을 특징으로 하는 연료탱크의 점용접 방법.The insulated tip is a spot welding method of a fuel tank, characterized in that the center of the insulator is formed to increase the current density by forming a neck. 제1항에 있어서,The method of claim 1, 상기 플레이트 사이 접합면에는 방진 및 방청성을 높이고 용접으로 인한 열변형을 방지하는 열경화성 접합제를 개재하여 용접하는 것을 특징으로 하는 연료탱크의 점용접 방법.Spot welding method of the fuel tank, characterized in that the welding surface between the plate through the thermosetting adhesive to increase the dust and corrosion resistance and prevent thermal deformation due to welding. 제3항에 있어서, The method of claim 3, 상기 열경화성 접합제는, 에폭시수지 45 ~ 65 중량%, 탄산칼슘 18 ~ 32 중량%, 카본 5 ~ 15 중량%, 산화칼슘 2 ~ 6 중량%를 포함하고 있는 것을 특징으로 하는 연료탱크의 점용접 방법.The thermosetting binder, 45 to 65% by weight epoxy resin, 18 to 32% by weight calcium carbonate, 5 to 15% by weight carbon, 2 to 6% by weight calcium oxide spot welding method characterized in that .
KR1020040044933A 2004-06-17 2004-06-17 spot welding method for fuel tank KR100598881B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020040044933A KR100598881B1 (en) 2004-06-17 2004-06-17 spot welding method for fuel tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040044933A KR100598881B1 (en) 2004-06-17 2004-06-17 spot welding method for fuel tank

Publications (2)

Publication Number Publication Date
KR20050119814A true KR20050119814A (en) 2005-12-22
KR100598881B1 KR100598881B1 (en) 2006-07-10

Family

ID=37292419

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020040044933A KR100598881B1 (en) 2004-06-17 2004-06-17 spot welding method for fuel tank

Country Status (1)

Country Link
KR (1) KR100598881B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150072194A (en) * 2013-12-19 2015-06-29 지엠 글로벌 테크놀러지 오퍼레이션스 엘엘씨 A coating composition for rust prevention performance and vibration damping effect comprising epoxy resin
KR102059894B1 (en) * 2018-06-21 2019-12-27 대우공업 (주) Structure of eletrode tip for spot welding equipment that minimizes indentation impression
JP2020127958A (en) * 2019-02-08 2020-08-27 日本製鉄株式会社 Electrode for resistance spot welding and manufacturing method of resistance spot welding coupling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102303780B1 (en) 2020-07-03 2021-09-17 한국생산기술연구원 Welding method of terminal and wire applied to electric motor for electric vehicle
KR20220004333A (en) 2020-07-03 2022-01-11 한국생산기술연구원 Terminal of electric motor for electric vehicle and electrode unit for welding it

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970069221A (en) * 1996-04-27 1997-11-07 송영수 Welding method of spotless spot welding and its implementation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150072194A (en) * 2013-12-19 2015-06-29 지엠 글로벌 테크놀러지 오퍼레이션스 엘엘씨 A coating composition for rust prevention performance and vibration damping effect comprising epoxy resin
KR102059894B1 (en) * 2018-06-21 2019-12-27 대우공업 (주) Structure of eletrode tip for spot welding equipment that minimizes indentation impression
JP2020127958A (en) * 2019-02-08 2020-08-27 日本製鉄株式会社 Electrode for resistance spot welding and manufacturing method of resistance spot welding coupling

Also Published As

Publication number Publication date
KR100598881B1 (en) 2006-07-10

Similar Documents

Publication Publication Date Title
KR102091920B1 (en) Battery, particularly a button cell, and method for manufacture of such a battery
KR100598881B1 (en) spot welding method for fuel tank
KR20120039500A (en) Spark plug
US10207353B2 (en) Indirect spot welding method
WO2019196494A1 (en) Resistance spot welding electrode cap
WO2014073665A1 (en) Cover material for hermitic sealing and package for containing electronic component
JP2018156728A (en) Manufacturing method of spark plug
CA2063802A1 (en) Method of closing one end of the case of a sodium/sulphur cell and a sodium/sulphur cell produced by this method
EP0266777B1 (en) Electric resistance welding for zinc plated steel plate
US20100044349A1 (en) Method of welding aluminum sheets
JP4537677B2 (en) Lead-acid battery terminal structure
CN101638787A (en) Sacrificial magnesium alloy anode with external resistor
JP4294341B2 (en) Sealed battery and its manufacturing method
CN109365976A (en) A kind of production method and mold of Resistance Welding receiving electrode
JP5369293B2 (en) Chip inductor and manufacturing method thereof
JP5036280B2 (en) Hermetic terminal and manufacturing method thereof
KR100538266B1 (en) Manufacturing method for fuel tank combined with suspension frame
CN213584191U (en) Spot welding structure of rectifier bridge diode and connecting sheet for generator
CN206904415U (en) A kind of flange
CN112191989A (en) Method for welding fillet weld of hydraulic support through large penetration depth of robot
KR20120123769A (en) Sealing member and manufacturing method of it
US2025028A (en) Dry cell
CN202983663U (en) Multilayer coating structure of reaction tower
CN216671410U (en) Fully-sealed super capacitor battery cover and battery
CN108857025A (en) Body hinge fixture nut plate welding procedure and welding structure

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130628

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20140701

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20150619

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20160704

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20170703

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20180703

Year of fee payment: 13

FPAY Annual fee payment

Payment date: 20190531

Year of fee payment: 14