JPH02200795A - Surface treatment of weld zone - Google Patents
Surface treatment of weld zoneInfo
- Publication number
- JPH02200795A JPH02200795A JP1983189A JP1983189A JPH02200795A JP H02200795 A JPH02200795 A JP H02200795A JP 1983189 A JP1983189 A JP 1983189A JP 1983189 A JP1983189 A JP 1983189A JP H02200795 A JPH02200795 A JP H02200795A
- Authority
- JP
- Japan
- Prior art keywords
- weld zone
- scale
- coating
- weld
- surface treatment
- 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
Links
- 238000004381 surface treatment Methods 0.000 title claims description 4
- 238000005422 blasting Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 9
- 238000009713 electroplating Methods 0.000 claims description 4
- 238000010422 painting Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 238000003466 welding Methods 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000007747 plating Methods 0.000 abstract description 3
- 238000004070 electrodeposition Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241001290610 Abildgaardia Species 0.000 description 1
- 240000007124 Brassica oleracea Species 0.000 description 1
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
- 235000012905 Brassica oleracea var viridis Nutrition 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
（産業−にの利用分野）
本発明は溶接部の表向処理ブ）法に関ｊ、２、更に詳し
くは、耐食性が擾ねた溶接部表面を形成することができ
る方法に関する。[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a method for surface treatment of welded parts. Regarding how it can be done.
（従来の技術）
自動車のエンジンル−ム、フロアメイン、ボアー等は、
各プ、ニット部品を溶接して組立てられたのち、粉体塗
装やカチオン電着塗装などが施、へれて、耐食性や美観
が４１与される。(Conventional technology) Automobile engine rooms, floor mains, bores, etc.
After each knitted part is welded and assembled, powder coating and cationic electrodeposition coating are applied to give it corrosion resistance and aesthetic appeal.
（発明が解決しようとする問題点）
ところで、溶接後の溶接部に４−？いでは、その表面に
、酸化物を主成分と°づるスろ一ルが形成される。そし
ζ１．二の゛入炉−。＋１７を除去Ｖることなく１、前
記した粉体塗装やカチオン電着塗装を施すと、形成され
る塗膜と溶接部との密着性が悪くなり５二の部分の耐食
性が低下して短期間で赤錆を究１するという問題か生ず
る。(Problem to be solved by the invention) By the way, 4-? Then, a hole is formed on the surface, which mainly contains oxide. So ζ1. Second “entering the furnace.” If the above-mentioned powder coating or cationic electrodeposition coating is applied without removing +17, the adhesion between the formed coating film and the welded part will deteriorate, and the corrosion resistance of the part 52 will decrease, resulting in a short period of time. The problem arises of getting rid of red rust.
そのため、塗装処理に先立ち、溶接部表面のス々−ルを
除去する作業が１テわれている。しかしながら、二〇ノ
、ケール除去作業は、概ね、手作業とし、て行われてい
るため、スケール除去が不充分となる。とくに、凹所や
内側角部のような個所の場合、そのスケール除去ははな
はだ困難であり、溶接部からスケールを完全に除去でき
ないことがある。ｔだ、スゲ・ル除去作業を充分に行お
うとする場合、作業Ｈはぞの１乍業を長時１期をかけ°
て慎重に１テうことが必要になるノ、−め、工数の増大
に基づくコストアッノ“を招くよろぼなる。Therefore, prior to the painting process, one step is to remove the sulls on the surface of the welded part. However, since the kale removal work is generally carried out manually, scale removal is insufficient. Particularly in the case of locations such as recesses and inside corners, it is extremely difficult to remove scale, and it may not be possible to completely remove scale from the weld. If you want to do the sedge removal work thoroughly, work H should be done for a long period of time.
However, it becomes necessary to carefully consider the process, which can lead to increased costs due to increased man-hours.
本発明は、非常に簡単に溶接部のスケールを除去し、そ
の結果、塗膜との密着性を高めるごとにより、耐食性の
向トが図られる溶接部の表面処理方法の擾供を目的とず
８゜
（課題を解決ｊるための手段・作用）
Ｉ−記しまた１１的を達成−堪るために、本発明Ｇこお
いては５溶接部にシッコ１〜プラス処理を施したのち、
塗装処理または電気めっき処理を施１ごとを特徴接
理 ・提供される。The purpose of the present invention is not to provide a method for surface treatment of welds that can remove scale from welds very easily, thereby improving corrosion resistance by increasing adhesion to the paint film. 8゜(Means/effects for solving the problem) I-In order to achieve the 11th objective, in the present invention G, after applying Shikko 1 to Plus treatment to 5 welded parts,
Painted or electroplated for each unique connection.
・Provided.
本発明方法は、ｊｍ常イ］われ一ζいるアーク溶接、ガ
スｉ８接、チルミント溶接などで形成される溶接部で、
その表面にスケール等が（：１着し“Ｃいる場合に適用
される。The method of the present invention is a welded part formed by arc welding, gas welding, chill mint welding, etc.
Applicable when there is scale etc. on the surface.
本発明方法においでは、まずＪ・記したｉ８接部にジョ
ン［ブラスト処理を施しで、ｎｉｌ記溶接部の表に形成
されているスケールが除去される。ショツトブラスト処
理は、標的である溶接部に、鉄球粒のショットや鋭８角
の多い鉄片粒のグリッドを所定の投射速度ご叩き′月Ｊ
で、溶接部表面のスケ−・ルを剥離上・・し、めたり、
または切削したりするのであるが、その場合、そのスケ
ールの材質、大きさ、溶接部への（−１着状態などに応
じて、適宜な硬さと粒度のショットやグリッドが選定さ
れ、また溶接部への投射速度も適宜に選定される。In the method of the present invention, first, the i8 joint marked J is subjected to John blasting treatment to remove the scale formed on the surface of the welded part marked nil. Shot blasting involves hitting the target weld with a shot of iron balls or a grid of iron pieces with many acute angles at a predetermined velocity.
Then, peel off the scale on the surface of the weld, and then remove it.
In this case, a shot or grid of appropriate hardness and grain size is selected depending on the material of the scale, its size, and the condition of the weld (-1). The projection speed is also appropriately selected.
例えば、自動車のボデー・−の組立時に、その構成部品
をスポット溶接しで形成される溶接部に対しては、硬さ
は、４０〜５０ＨＲ，ｃ、粒度０．７〜１． ＯＩＭｗ
ａ程度のシック［・を投射速度１５〜２０ｍ／ｓｅｃで
４０へ・６０秒程彦溶接部に投射すると、溶接部表面の
スケールは略全部除去することができて好適である。For example, when assembling an automobile body, the welds formed by spot welding the component parts have a hardness of 40-50 HR.c and a grain size of 0.7-1. OIMw
It is preferable to project a thick film of about 100 m/sec onto the welded part for about 40 to 60 seconds at a projection speed of 15 to 20 m/sec, since it is possible to remove almost all the scale on the surface of the welded part.
表面のスケールが除去された溶接部には、塗装処理また
は電気めっき処理が施されてＹ−４的とする塗膜が形成
される。The welded portion from which the surface scale has been removed is subjected to painting or electroplating to form a coating film similar to Y-4.
塗装処理としては、格別限定されるものではなく１５例
えば、粉体塗装、スプレー塗装、電着塗装などがあげら
れ、また電気めっき処理としては、例えば、通常の湿式
め、つきなどがあげられる。The coating treatment is not particularly limited15 and includes, for example, powder coating, spray coating, electrodeposition coating, etc., and the electroplating treatment includes, for example, ordinary wet plating, plating, and the like.
既に、ショツトブラスト処理により溶接部の表面のスケ
ールは除去されているので、Ｊ〕記した塗装処理または
電気めっき処理によって形成された塗膜は、溶接部の表
面に密着する。Since the scale on the surface of the welded part has already been removed by shot blasting, the coating film formed by the painting process or electroplating process described in J] adheres closely to the surface of the welded part.
（実施例）
６点のスボッ目容接によって自動屯のソロアメ・インを
組立てた。(Example) A solo ame-in of an automatic ton was assembled by six points of subokkume connection.
このフロ゛？メインを、シーントハンガーブラストのフ
ックに吊り下゛げ、ここに、硬さが５０８Ｒ，、粒度１
． Ｏａｍのショットを投射速度２０ ｍ ／ ｓｅｃ
、ご６０秒間投射した。This floor? Hang the main part on the hook of the Scene Hanger Blast, and place the hardness of 508R, particle size of 1.
．． Projection speed of Oam shot is 20 m/sec
, was projected for 60 seconds.
しかるのちに、得られたフロアメーンに常用のカチオン
電着塗装を施し、５表面全体をエポキシ樹脂系の黒色塗
膜で被覆し７た。Thereafter, the obtained floor main was subjected to a conventional cationic electrodeposition coating, and the entire surface was coated with an epoxy resin-based black coating.
その後、塗膜表面に日本丁７規格（ＪＩＳ）で規定する
塩水噴霧試験を施し、溶接点に赤錆が発生ずるまでの時
間を計測した。ぞの結尿、５００時間経過後には、６点
の溶接スポットの・うら、１点に赤錆が発佳し、た。Thereafter, the surface of the coating film was subjected to a salt spray test specified in Japan Standard 7 Standard (JIS), and the time until red rust appeared at the welding points was measured. After 500 hours, red rust developed on one spot on the back of six welding spots.
比較のために、ショツトブラストをかけずにそのまま実
施例と同様のカチオン電着！装を行い、同様の塩水噴霧
試験を行った。その結果、１． Ｏ０時間経過後には、
４．壱に赤錆が発生した。For comparison, cationic electrodeposition was performed in the same manner as in the example without shot blasting! A similar salt spray test was conducted. As a result, 1. After O0 time has passed,
4. Red rust appeared on one.
（発明の効牙）
以上の説明で明らか・なよ・）に、本発明方法は、ぞの
構成を溶接部ｒジ１ントゾラスト処理を施したのも、塗
装処理または電気めっき処理を施・４ようにしたので、
溶接部表面に形成されているスケールは除去される。そ
の結果、溶接部表面とそごに形成される塗膜とは７′ｉ
、いに密着することになり、その部分の耐食性は向トす
る。(Effects of the Invention) As is clear from the above explanation, the method of the present invention applies to the welded portions of the welded portions. So,
Scale formed on the surface of the weld is removed. As a result, the coating film formed on the surface of the weld and the edges is 7'i
, and the corrosion resistance of that part will deteriorate.
また、本発明方法は、ショツトブラストで溶接部表向の
スケールを除去するため、従来のように除去が不充分で
あったり、または長時間の作業であったりすることがな
くなるので、」１業的であり、したがって製品のコスト
ダウンに資することができる。In addition, since the method of the present invention removes scale on the surface of the weld by shot blasting, removal is not insufficient or requires a long time as in the conventional method. Therefore, it can contribute to reducing the cost of the product.
出願人 −：菱自動屯Ｔ業株式会社 代理人 弁理士 長 門 侃Applicant -: Ryoji Automatic T-Gyo Co., Ltd. Agent Patent Attorney Kan Nagado
Claims (1)
または電気めっき処理を施すことを特徴とする溶接部の
表面処理方法。A method for surface treatment of welded parts, which comprises subjecting the welded parts to shot blasting and then painting or electroplating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983189A JPH02200795A (en) | 1989-01-31 | 1989-01-31 | Surface treatment of weld zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983189A JPH02200795A (en) | 1989-01-31 | 1989-01-31 | Surface treatment of weld zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02200795A true JPH02200795A (en) | 1990-08-09 |
Family
ID=12010230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983189A Pending JPH02200795A (en) | 1989-01-31 | 1989-01-31 | Surface treatment of weld zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02200795A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005138123A (en) * | 2003-11-05 | 2005-06-02 | Hitachi Ltd | Structure and method for joining dissimilar metal |
| JP2006222023A (en) * | 2005-02-14 | 2006-08-24 | Ngk Spark Plug Co Ltd | Method for manufacturing spark plug |
| JP2013226585A (en) * | 2012-04-26 | 2013-11-07 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing welded structure |
-
1989
- 1989-01-31 JP JP1983189A patent/JPH02200795A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005138123A (en) * | 2003-11-05 | 2005-06-02 | Hitachi Ltd | Structure and method for joining dissimilar metal |
| JP2006222023A (en) * | 2005-02-14 | 2006-08-24 | Ngk Spark Plug Co Ltd | Method for manufacturing spark plug |
| JP2013226585A (en) * | 2012-04-26 | 2013-11-07 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing welded structure |
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