JPH01272683A - Method for bonding automotive steel sheet - Google Patents

Method for bonding automotive steel sheet

Info

Publication number
JPH01272683A
JPH01272683A JP10298988A JP10298988A JPH01272683A JP H01272683 A JPH01272683 A JP H01272683A JP 10298988 A JP10298988 A JP 10298988A JP 10298988 A JP10298988 A JP 10298988A JP H01272683 A JPH01272683 A JP H01272683A
Authority
JP
Japan
Prior art keywords
adhesive
steel plates
thermoplastic resin
steel sheet
steel
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP10298988A
Other languages
Japanese (ja)
Inventor
Takayoshi Iwata
岩田 貴吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP10298988A priority Critical patent/JPH01272683A/en
Publication of JPH01272683A publication Critical patent/JPH01272683A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

PURPOSE:To eliminate contact of water with an adhesive in washing, prevent an adhesive from discharging and smoothly carry out bonding of automotive steel sheets, by applying a molten thermoplastic resin in the form of banks on the surface of a steel sheet around the adhesive coated in a tacking step. CONSTITUTION:For example, a steel sheet 10 is coated with a pasty epoxy resin adhesive 1 and a thermoplastic resin 2 is then applied in the form of banks to both sides thereof below the above-mentioned adhesive 1. The afore- mentioned steel sheet 10 is subsequently applied to a steel sheet 20 and subjected to spot welding to tack the gap between the steel sheets 10 and 20 at preferably 0.2mm. Washing water is then sprayed thereon and electrodeposition coating is applied and thermally cured to bond the two steel sheets 10 and 20.

Description

【発明の詳細な説明】 [産業上の利用分野〕 本発明は自動車の例えばドアパネルの製造時などに用い
られる鋼板の接着方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for adhering steel plates used in the manufacture of door panels for automobiles, for example.

[従来の技術] 自動車のドアパネルには、2枚の鋼板を間隔を隔てて重
ねた合わせパネルが用いられている。この合わせパネル
を構成する2枚の鋼板を接合するには、従来スポット溶
接に併せて接着が用いられている。
[Prior Art] Automobile door panels use laminated panels in which two steel plates are stacked with a gap between them. Conventionally, spot welding and adhesion have been used to join the two steel plates that make up the laminated panel.

このドアパネルの接着方法の一例を説明すると、まず2
枚の鋼板の一方にペースト状接着剤をビード状に塗布す
る。そして2枚の鋼板を貼り合わせた後、ヘムフランジ
加工を゛しスポット溶接する。
To explain an example of how to bond this door panel, first 2.
A bead of paste adhesive is applied to one of the steel plates. After bonding the two steel plates together, the hem flange is processed and spot welded.

次に重ねられた2枚の鋼板に温水を吹きつけて油分、ゴ
ミなどを洗浄し、その後電着塗装を施す。
Next, hot water is sprayed onto the two stacked steel plates to clean them of oil and dirt, and then electrodeposition is applied.

モして′i8g塗装された塗装を加熱乾燥させるのであ
るが、その際に同時に接着剤を硬化させ、2枚の鋼板を
接着する。このようにスポット溶接と接着とを併用する
ことにより、ドアパネル内部の防錆性能を向上させると
ともに、スポット溶接部の剛性、疲労強度などを向、L
さぜるものである。
The 18g coating was then heated and dried, at the same time the adhesive was cured and the two steel plates were bonded together. By using spot welding and adhesion together in this way, we can improve the rust prevention performance inside the door panel, and improve the rigidity, fatigue strength, etc. of the spot welding area.
It is something to stir.

[粍明が解決しようどする課題] 上記した従来の鋼板の接着方法においで、接着剤4.1
電W塗躾の乾燥1稈までは硬化せずペースト状を維持し
ている。そのため洗浄工程で洗浄水が塗布された接着剤
に接触(,5、洗浄水の圧力により接種剤がパネル合わ
せmlから流れ出てしまうという不具合があプた。その
ため洗浄水の圧力を低くl、2て対処しているが、接種
剤の流出は皆無と1よならず、洗浄力が小さいため洗浄
紀要する時間が良いという問題がある。
[Problem that Rimei tries to solve] In the above-mentioned conventional method of bonding steel plates, adhesive 4.1
It does not harden and remains paste-like until the first dry culm of electric W coating. As a result, during the cleaning process, the cleaning water came into contact with the applied adhesive (5. The pressure of the cleaning water caused the inoculant to flow out of the panel assembly. Therefore, the pressure of the cleaning water was lowered, 2. However, there is a problem that there is almost no leakage of the inoculant, and the cleaning power is low, so it takes a long time to clean.

本発明はこの問題点に鑑み工なされたものであり、洗浄
工■において接着剤が流れ出るのを防止することを技術
的課題とするものである。
The present invention has been devised in view of this problem, and its technical objective is to prevent the adhesive from flowing out during the cleaning process.

[課題を解決するための手段] 本発明の自vI車鋼板の接w7′i法は、2枚の鋼板の
一方にペースト状接着剤を塗布し2枚の鋼板を貼り合わ
せ春で仮止めする仮止め工程と、仮止めされた2枚の鋼
板に洗浄水を吹きつけて洗浄する洗浄工程と、洗浄され
た2枚の鋼板に電、11塗装を施した侵加熱して塗布さ
れた′R春tl膜を硬化さ1するとともに接着剤を硬化
させて2枚の鋼板を接着する接着工程と、を行なう接着
方法において、洗浄工程より前1、仮止め工程で塗布さ
れる接着剤の周囲の鋼板表面に溶融した熱可塑性樹脂を
堤状に塗布して固化させ、洗浄水と接着剤との接触を堤
状に固化した熱可塑性樹脂で遮るようにしたことを特徴
とする。
[Means for Solving the Problems] The method of welding steel plates for automobiles according to the present invention involves applying a paste adhesive to one of two steel plates, and then bonding the two steel plates together and temporarily fixing them with a spring. A temporary fixing process, a cleaning process in which the two temporarily attached steel plates are sprayed with cleaning water, and the two cleaned steel plates are coated with an erodible 11 coating. In the bonding method, which involves curing the spring TL film and curing the adhesive to bond two steel plates together, before the cleaning step, the area around the adhesive applied in the temporary fixing step is It is characterized in that a molten thermoplastic resin is applied to the surface of the steel plate in a bank-like manner and solidified, and the solidified thermoplastic resin in the bank-shape blocks contact between the cleaning water and the adhesive.

本発明に用いられるペースト状接着剤としては加熱硬化
ヤのものを主として用いることができ、従来と同様にエ
ポキシ樹脂系接着剤、アクリル樹脂系接着剤、フェノー
ル樹脂系接着剤などを用いることが−ぐきる。付着性に
積れ、防錆性能にも優れたコニボキシ樹脂接着剤を用い
ることが好ましい。
As the paste adhesive used in the present invention, heat-curing adhesives can be mainly used, and as in the past, epoxy resin adhesives, acrylic resin adhesives, phenolic resin adhesives, etc. can also be used. Gulp. It is preferable to use a coniboxy resin adhesive which has good adhesion and excellent antirust performance.

なお、jsI八に:よっては常温硬化型の接着剤を用い
ることもできる。この場合は接着剤が硬化する前に洗浄
工程を行なうことで本発明の効果が4現する。
Note that, depending on the case, a room temperature curing adhesive may also be used. In this case, the four effects of the present invention can be achieved by performing a cleaning step before the adhesive hardens.

本発明の最大の特徴は、洗浄■稈より前に、接着剤の周
囲の鋼板表面に溶融した熱可塑性樹脂を堤状にす介し固
化させるところにある。ここで熱可塑性IN!lとして
は、熱変形温度が150℃以上のものが望ましい。この
ような樹脂を用いれば電着塗膜の加熱硬化時に熱可塑性
樹脂が溶融して2枚の鋼板の間から流れ出すのが防止さ
れる。このようなIi/4Illとしては熱変形温度1
50〜220℃のポリエステル樹脂、ポリアミド樹脂な
どがある。
The most important feature of the present invention is that before cleaning the culm, the molten thermoplastic resin is passed through the surface of the steel plate around the adhesive in a bank shape and solidified. Thermoplastic IN here! It is desirable that l has a heat deformation temperature of 150° C. or higher. If such a resin is used, the thermoplastic resin will be prevented from melting and flowing out from between the two steel plates during heat curing of the electrodeposited coating. For such Ii/4Ill, the heat distortion temperature is 1
Examples include polyester resins and polyamide resins with temperatures ranging from 50 to 220°C.

またホットメルト接着剤として利用される熱可塑性樹脂
を用いることも好ましい。このようにすれば電着塗膜の
加熱時に熱可塑性樹脂も2枚の鋼板を接着するため、接
着強度を一層向上させることができる。
It is also preferable to use a thermoplastic resin that is used as a hot melt adhesive. In this way, the thermoplastic resin also bonds the two steel plates together when the electrodeposited coating is heated, so that the bonding strength can be further improved.

熱可塑性樹脂を塗布するのは、接着剤を塗布する前に行
なってもよいし接着剤を塗布した後行なうこともできる
。また接着剤と熱可塑性樹脂とを同時に中布することも
可能である。なお、熱可塑性樹脂の塗布厚さは、2枚の
鋼板が接着された時の2枚の鋼板の[lliとほぼ等し
くするのが望ましく、接II前の接1剤の塗布厚さより
薄くする必要がある。一般にはスポット溶接可能な0,
5u+以下である。
The thermoplastic resin may be applied before or after the adhesive is applied. It is also possible to use adhesive and thermoplastic resin at the same time. In addition, it is desirable that the coating thickness of the thermoplastic resin be approximately equal to the [lli of the two steel plates when the two steel plates are bonded together, and it must be thinner than the coating thickness of the bonding agent 1 before bonding II. There is. In general, spot weldable 0,
It is 5u+ or less.

洗浄工程は従来と同様に50℃程度の温水を吹き付けて
行なうことができる。なお本発明では接着剤の流出が防
止されているので、洗浄水の圧力を3〜5 ko/ a
lと従来より^目に設定することができる。これにより
洗浄力が増大する。
The cleaning step can be carried out by spraying hot water of about 50° C. as in the conventional method. In addition, in the present invention, since the adhesive is prevented from flowing out, the pressure of the cleaning water is adjusted to 3 to 5 ko/a.
It can be set to l and ^th than conventionally. This increases cleaning power.

接着工程は′IIII!塗装工程と1!着塗膜の乾燥工
程とからなる。そして乾燥工程における加熱により接着
剤が硬化して2枚の鋼板が接着される。電着塗装1稈で
使用される塗料、塗装条件などは従来と同様である。ま
た乾燥工程も例えば180℃で30〜40分加熱するな
ど、従来と同条件で行なうことができる。なお、I!春
塗装工程の前にリン酸亜鉛被膜などを形成する化成処理
工程を行なうこともできる。
The gluing process is 'III! Painting process and 1! It consists of a drying process of the applied coating film. Then, the adhesive is cured by heating in the drying process, and the two steel plates are bonded together. The paint used for one culm of electrodeposition coating, coating conditions, etc. are the same as before. The drying step can also be carried out under the same conditions as conventional methods, such as heating at 180° C. for 30 to 40 minutes. Furthermore, I! A chemical conversion treatment step to form a zinc phosphate film or the like may also be performed before the spring painting step.

[発明の作用および効果] 本発明の鋼板の接着方法では、洗浄工程では接着剤の周
囲の鋼板表面に堤状に固化した熱可塑性樹脂が塗布され
ている。従ってこの堤状の熱可塑性樹脂により、洗浄水
が接着剤と接触するのが防止され、接着剤が2枚の鋼板
の間から流れ出るのが防止される。
[Operations and Effects of the Invention] In the steel plate bonding method of the present invention, a hardened thermoplastic resin is applied in the shape of a bank to the surface of the steel plate around the adhesive in the cleaning step. This bank-like thermoplastic resin therefore prevents cleaning water from coming into contact with the adhesive and prevents the adhesive from flowing out from between the two steel plates.

従って本発明のt14根の接着方法によれば、塗布され
た接着剤はそのほとんどが接着!:寄与づるため、鋼板
の接着力を轟く維持することかで・きるとともに、洗浄
工程における洗浄水の圧力を高めることができる。これ
により洗浄工程に要する時間が短縮される。
Therefore, according to the method of adhering T14 roots of the present invention, most of the applied adhesive is adhered! : As a result, it is possible to maintain strong adhesion of the steel plate and increase the pressure of the cleaning water in the cleaning process. This reduces the time required for the cleaning process.

[実施例] 以下実施例により具体的に説明覆゛る。本実施例では自
動車のドアパネルを構成4る鋼板の接着に本発明を適用
したものである。
[Example] A detailed explanation will be given below using Examples. In this example, the present invention is applied to bonding steel plates constituting an automobile door panel.

(仮止め工程) まず1枚の鋼板10の周縁部に、第2図に示すようにペ
ースト状のエポキシ樹脂接着剤1(rEA9432NA
]デクスター社製)をビード状にノズルより塗布する。
(Temporary fixing process) First, as shown in FIG.
] (manufactured by Dexter) from a nozzle in the form of a bead.

次に塗布されたエポキシ樹脂接着剤1の両側に、ポリエ
ステルs1脂系のホットメルト接着剤(rPEs−17
0H)東亜合成(株)wJ)と1ノで利用される熱可塑
性樹脂2を別のノズルより、第3図に示すように塚状に
途布り−る。このとき熱可塑性樹脂2の^さはエポキシ
樹脂接着剤1の高さJ二り低くされる。イL7て熱可塑
性相l1lt2は塗布後数分で外気により冷え【固化す
る。
Next, apply polyester S1 resin hot melt adhesive (rPEs-17) to both sides of the applied epoxy resin adhesive 1.
The thermoplastic resin 2 used in 0H) produced by Toagosei Co., Ltd. and 1 was dispersed into a mound shape as shown in FIG. 3 from another nozzle. At this time, the height of the thermoplastic resin 2 is made lower than the height J of the epoxy resin adhesive 1. The thermoplastic phase l1lt2 cools and solidifies due to the outside air within a few minutes after application.

次に他方の鋼板20を−h17)鋼板10に重ねで貼り
合わ↑t1ヘムフランジ加工を()ない周縁部をスボッ
1〜溶接する。このときエポキシ樹脂接着i?i1は押
1′Fされて高さが低くなり、第1図に丞IJ1、うに
他方の!il板20表向が熱可塑性樹rf121.lT
当接する。この時の鋼板10および鋼板20の間隙は約
O02儒駆であり、エポキシS+脂1および熱可塑性樹
脂2の高さもそれぞれ約0.2m−とな二フている。
Next, the other steel plate 20 is laminated onto the steel plate 10 (-h17) and welded at the periphery without hem flange processing (). At this time, epoxy resin adhesive i? i1 is pushed 1'F and its height is lowered, and in Figure 1 it is IJ1, and the other! The surface of the IL plate 20 is made of thermoplastic resin RF121. lT
come into contact with At this time, the gap between the steel plate 10 and the steel plate 2 is approximately 002 m, and the heights of the epoxy S+ resin 1 and the thermoplastic resin 2 are also approximately 0.2 m.

〈洗浄工程) 上記により仮止めされた2枚の鋼板よりなるパネルに、
50℃に温められた洗浄水を吹きつけイ〉。
<Cleaning process> A panel consisting of two steel plates temporarily fixed in the above manner,
Spray with cleaning water heated to 50℃.

なお、その洗浄水の圧力を1kL−’am!がら3 k
g/C1の間で変化させて吹きつ番ノ、それぞれエポキ
シ樹脂接着剤1の飛散距離を消査した。なおlllli
l時に熱可塑性樹脂2を塗布しない従来の接着方法によ
り仮止めされI;パネルも同様に試験し、エポキシ樹脂
接着剤1の飛散距離を調査Eノで結果を表に示す。
In addition, the pressure of the washing water is 1kL-'am! Gara 3k
The scattering distance of the epoxy resin adhesive 1 was investigated by varying the blowing number between g/C1. Naolllli
The panel was temporarily fixed by a conventional adhesive method without applying the thermoplastic resin 2 at the time of I; the panel was also tested in the same way, and the scattering distance of the epoxy resin adhesive 1 was investigated.The results are shown in the table.

表 表より従来の接着方法で仮止めされたパネルでは、洗浄
水の圧力が増大するに伴って接着剤の飛散距離も長くな
っているが、本発明の接着方法により仮止めされたパネ
ルでは、エポキシ樹脂接着剤1は殆んど飛散していない
As can be seen from the table, in panels temporarily bonded using the conventional adhesive method, the scattering distance of the adhesive increases as the pressure of cleaning water increases, but in panels temporarily bonded using the adhesive method of the present invention, Epoxy resin adhesive 1 was hardly scattered.

(接着工程) 次に仮止めされ洗浄されたパネルをN着塗料中に浸漬し
てiI着塗装し、引き上げた後180℃で30〜40分
乾燥させた。そして電!?塗膜の硬化とともにエポキシ
樹脂接着剤1が硬化し、2枚の鋼板10.20は確実に
接着された。なお接着工程において、熱可塑性相111
ffi2は若干軟化したが、溶融して鋼板の合せ目から
流れ出すまでには至らず、2枚の鋼板10.20をホッ
トメルトにより接着している。
(Adhesion process) Next, the temporarily fixed and washed panel was immersed in an N-coating paint, coated with an II coating, pulled up, and dried at 180° C. for 30 to 40 minutes. And electricity! ? The epoxy resin adhesive 1 was cured as the coating film was cured, and the two steel plates 10 and 20 were reliably bonded together. Note that in the bonding process, the thermoplastic phase 111
Although ffi2 softened slightly, it did not melt and flow out from the seam of the steel plates, and the two steel plates 10.20 were bonded together by hot melt.

本実施例ではエポキシ樹脂接着剤1を塗布後熱可塑性樹
脂2を塗布したが、逆に熱可塑性樹脂2を塗布した侵に
エポキシ樹脂接着剤1を塗布することもできる。また第
4図に示すように、熱可塑性s1脂2とエポキシ樹脂接
着剤1とを同時に塗布することも可能である。さらにエ
ポキシ樹脂接着剤1と熱可塑性樹脂2とを、2枚の鋼板
にそれぞれ対向するように塗布してもよい。
In this embodiment, the thermoplastic resin 2 was applied after the epoxy resin adhesive 1 was applied, but the epoxy resin adhesive 1 can also be applied to the area where the thermoplastic resin 2 has been applied. Further, as shown in FIG. 4, it is also possible to apply the thermoplastic S1 resin 2 and the epoxy resin adhesive 1 at the same time. Furthermore, the epoxy resin adhesive 1 and the thermoplastic resin 2 may be applied to two steel plates so as to face each other.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はドアパネルの要部断面図、第2図は接着剤を塗
布している状態を示す説明図、第3図は熱可塑性樹脂を
塗布している状態を示す説明図、第4図は接着剤と熱可
塑性樹脂とを同時に塗布している状態を示す説明図であ
る。 1・・・エポキシ樹脂接着剤  2・・・熱可塑性樹脂
10.20・・・鋼板 特許出願人  豊田合成株式会社
Figure 1 is a sectional view of the main part of the door panel, Figure 2 is an explanatory diagram showing the state in which adhesive is applied, Figure 3 is an explanatory diagram showing the state in which thermoplastic resin is applied, and Figure 4 is an explanatory diagram showing the state in which the thermoplastic resin is applied. FIG. 3 is an explanatory diagram showing a state in which an adhesive and a thermoplastic resin are applied at the same time. 1...Epoxy resin adhesive 2...Thermoplastic resin 10.20...Steel plate patent applicant Toyoda Gosei Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] (1)2枚の鋼板の一方にペースト状接着剤を塗布し2
枚の該鋼板を貼り合わせて仮止めする仮止め工程と、 仮止めされた2枚の該鋼板に洗浄水を吹きつけて洗浄す
る洗浄工程と、 洗浄された2枚の該鋼板に電着塗装を施した後加熱して
塗布された電着塗装を硬化させるとともに該接着剤を硬
化させて2枚の該鋼板を接着する接着工程と、を行なう
接着方法において、 該洗浄工程より前に、該仮止め工程で塗布される該接着
剤の周囲の該鋼板表面に溶融した熱可塑性樹脂を堤状に
塗布して固化させ、該洗浄水と該接着剤との接触を堤状
に固化した該熱可塑性樹脂で遮るようにしたことを特徴
とする自動車鋼板の接着方法。
(1) Apply paste adhesive to one side of two steel plates.
A temporary fixing process in which the two steel plates are pasted together and temporarily fixed together, a cleaning process in which the two temporarily attached steel plates are sprayed with cleaning water, and the two cleaned steel plates are electrocoated. In an adhesion method, the adhesion process is performed in which the two steel plates are bonded together by heating and then heating to cure the applied electrodeposition coating and curing the adhesive to bond the two steel plates together. A molten thermoplastic resin is applied in a bank shape to the surface of the steel plate around the adhesive applied in the temporary fixing process, and the resin is solidified in a bank shape, and the contact between the cleaning water and the adhesive is caused to solidify in the bank shape. A method for adhering automobile steel sheets, characterized by blocking the sheets with a plastic resin.
JP10298988A 1988-04-26 1988-04-26 Method for bonding automotive steel sheet Pending JPH01272683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10298988A JPH01272683A (en) 1988-04-26 1988-04-26 Method for bonding automotive steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10298988A JPH01272683A (en) 1988-04-26 1988-04-26 Method for bonding automotive steel sheet

Publications (1)

Publication Number Publication Date
JPH01272683A true JPH01272683A (en) 1989-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP10298988A Pending JPH01272683A (en) 1988-04-26 1988-04-26 Method for bonding automotive steel sheet

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Country Link
JP (1) JPH01272683A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0490703A (en) * 1990-08-02 1992-03-24 Moon Star Co Bonding method for three dimensional ornamental member on outer surface of shoe
WO2002087872A1 (en) * 2001-04-25 2002-11-07 Thyssenkrupp Stahl Ag Sheet steel billet that can be shaped to form a component
JP2011037378A (en) * 2009-08-11 2011-02-24 Nissan Motor Co Ltd Panel part and method for manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0490703A (en) * 1990-08-02 1992-03-24 Moon Star Co Bonding method for three dimensional ornamental member on outer surface of shoe
WO2002087872A1 (en) * 2001-04-25 2002-11-07 Thyssenkrupp Stahl Ag Sheet steel billet that can be shaped to form a component
JP2011037378A (en) * 2009-08-11 2011-02-24 Nissan Motor Co Ltd Panel part and method for manufacturing the same

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