JP3176068U - Stainless steel bolts - Google Patents

Stainless steel bolts Download PDF

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JP3176068U
JP3176068U JP2012001648U JP2012001648U JP3176068U JP 3176068 U JP3176068 U JP 3176068U JP 2012001648 U JP2012001648 U JP 2012001648U JP 2012001648 U JP2012001648 U JP 2012001648U JP 3176068 U JP3176068 U JP 3176068U
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stainless steel
bolt
nylon resin
steel bolt
steel bolts
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禎史 鵜野
和弘 村尾
渡 家鋪
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株式会社川金コアテック
岸和田ステンレス株式会社
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Abstract

【課題】高い防食性能と緩み防止性能を有するステンレス鋼ボルトを提供する。
【解決手段】ステンレス鋼ボルト1は、全体にダクロダイズド被膜が形成されるとともに、ねじ部4にナイロン樹脂による被覆層が形成されてなる。
【選択図】図1
A stainless steel bolt having high anticorrosion performance and loosening prevention performance is provided.
A stainless steel bolt (1) is formed with a dacrosolated coating on the whole and a coating layer made of nylon resin on a screw portion (4).
[Selection] Figure 1

Description

この考案は、ステンレス鋼ボルトに関し、さらに詳細には、高い防食性能と緩み防止性能が付与されたステンレス鋼ボルトに関する。   The present invention relates to a stainless steel bolt, and more particularly to a stainless steel bolt provided with high anticorrosion performance and loosening prevention performance.

ボルトの素材としては普通鋼やステンレス鋼が知られている。従来、普通鋼のものに関しては電気亜鉛めっき系の表面処理を施し、ステンレス鋼のものに関しては錆が生じない(あるいは腐食速度が遅い)とされていることから、そのままで使用するのが一般的である。   Common steel and stainless steel are known as bolt materials. Conventionally, ordinary steel is treated with electrogalvanized surface treatment, and stainless steel is not rusted (or has a slow corrosion rate), so it is generally used as it is. It is.

しかし、ステンレス鋼であっても異種金属と接触すると電位差による金属腐食(電食)が生じることが知られている。例えば、ステンレス鋼ボルトによって亜鉛めっき製の製品を締結すると、電食により相手材に錆が発生するなどの問題がある。また、ステンレス鋼ボルトは、強度が低く、強く締め付けるとリラクゼーション(クリープ)により遅れ破壊的に軸部が伸びるなどの欠点を有している。このようなことから、ステンレス鋼ボルトは、これまで積極的に使用されてこなかった。   However, even stainless steel is known to cause metal corrosion (electric corrosion) due to a potential difference when it comes into contact with a different metal. For example, when a product made of galvanization is fastened with a stainless steel bolt, there is a problem that rust is generated on the counterpart material due to electrolytic corrosion. In addition, stainless steel bolts have low strength, and when tightened strongly, there is a drawback that the shaft portion is delayed and broken due to relaxation (creep). For these reasons, stainless steel bolts have not been actively used so far.

なしNone

この考案は上記のような技術的背景に基づいてなされたものであって、次の目的を達成するものである。
この考案の目的は、高い防食性能と緩み防止性能を有するステンレス鋼ボルトを提供することにある。
This invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to provide a stainless steel bolt having high anticorrosion performance and loosening prevention performance.

この考案は上記課題を達成するために、次のような手段を採用している。
すなわち、この考案は、全体にダクロダイズド被膜が形成されるとともに、ねじ部にナイロン樹脂による被覆層が形成されてなることを特徴とするステンレス鋼ボルトにある。
This device adopts the following means in order to achieve the above-mentioned problems.
That is, this invention is a stainless steel bolt characterized in that a dacrosolated film is formed on the whole and a coating layer made of a nylon resin is formed on a thread portion.

この考案によれば、ステンレス鋼ボルトにダクロタイズド被膜を形成したので、ステンレス鋼ボルトの欠点であった異種金属と接触して発生する電位差による金属腐食を防止することができる。また、ねじ部にナイロン樹脂被覆層を形成したので、このナイロン樹脂被覆層が、ステンレス鋼ボルトに螺着される部材のめねじとの間のクリアランスを無くし、弾性復元力によってめねじとの間で大きな摩擦抵抗力を生じさせ、緩みを防止することができる。   According to this device, since the dacrotized film is formed on the stainless steel bolt, it is possible to prevent metal corrosion due to a potential difference generated in contact with the dissimilar metal, which was a defect of the stainless steel bolt. In addition, since the nylon resin coating layer is formed on the threaded portion, this nylon resin coating layer eliminates the clearance between the female screw of the member screwed to the stainless steel bolt, and the elastic restoring force makes it between the female screw. Can generate a large frictional resistance and prevent loosening.

この考案の実施形態を示す平面図である。It is a top view which shows embodiment of this invention.

この考案の実施形態を図面を参照しながら以下に説明する。図1に示すように、ステンレス鋼ボルト1は、周知のように軸部2と頭部3とからなり、軸部2にねじ部4が形成されている。   An embodiment of the invention will be described below with reference to the drawings. As shown in FIG. 1, the stainless steel bolt 1 includes a shaft portion 2 and a head portion 3 as well known, and a screw portion 4 is formed on the shaft portion 2.

この考案によるステンレス鋼ボルト1は、ボルト全体にダクロダイズド(登録商標)処理による被膜が形成され、またねじ部4にはナイロン樹脂によるコーティングが施されている。   In the stainless steel bolt 1 according to this device, a coating film is formed on the entire bolt by Daclozide (registered trademark) treatment, and the thread portion 4 is coated with a nylon resin.

ダクロダイズド処理は、次の加工工程で行われる。
1.脱脂
苛性ソーダを使用しての、この工程はボルトの鋼材加工中に付着する機械油や防錆用塗料、マーキング等の除去を目的として行う。これらの付着がない場合は省略される。
2.下地処理
基材との密着性を高めるため、鉄球等を用いたブラスト処理や化成処理を行う。
The dacrozide treatment is performed in the next processing step.
1. Degreasing This process using caustic soda is performed for the purpose of removing machine oil, anti-corrosion paint, markings, etc., which are adhered during the processing of bolt steel. If there is no such adhesion, it is omitted.
2. Ground treatment To improve the adhesion to the substrate, blasting or chemical conversion using iron balls or the like is performed.

3.浸漬塗装、一次コーター
被塗物であるステンレス鋼ボルトをバスケット等に入れて処理液(ダクロディップ)に浸漬塗装した後、余滴を遠心分離機等で除去する。
4.乾燥・焼成
余滴を除去した後、専用ラックに移し替えて約340度Cで焼成する。
3. Immersion coating, primary coater Put stainless steel bolts to be coated in a basket etc. and dip-coat them in the treatment liquid (Dacro Dip), and then remove the remaining drops with a centrifuge.
4). Drying and firing After removing the extra drops, transfer to a dedicated rack and fire at about 340 ° C.

5.二次工程
工程3,4を繰り返す(通常は2回)。
6.検査
加工後、外観検査等を行う。
5. Secondary step Repeat steps 3 and 4 (usually twice).
6). Inspection After processing, perform visual inspection.

上記のような処理を施すことにより、ステンレス鋼ボルト1の表面には金属亜鉛を3価クロム化合物で結合した銀白色のダクロタイズド被膜が形成される。このダクロタイズド被膜が形成されることによって、ステンレス鋼ボルトの欠点であった異種金属と接触して発生する電位差による金属腐食を防止することができる。   By performing the treatment as described above, a silver white dacrotized film in which metallic zinc is bonded with a trivalent chromium compound is formed on the surface of the stainless steel bolt 1. By forming this dacrotized film, it is possible to prevent metal corrosion due to a potential difference generated in contact with a dissimilar metal, which has been a drawback of stainless steel bolts.

ダクロタイズド処理の後、ねじ部4にナイロン樹脂を融着する。これによってねじ部4にナイロン樹脂被覆層5(図1に網点で示す部分)が形成される。ナイロン樹脂被覆層5は、ステンレス鋼ボルト1に螺着される部材のめねじとの間のクリアランスを無くし、弾性復元力によってめねじとの間で大きな摩擦抵抗力を生じさせ、緩みを防止する。   After the dacrotized treatment, a nylon resin is fused to the screw portion 4. As a result, the nylon resin coating layer 5 (portion indicated by a halftone dot in FIG. 1) is formed on the screw portion 4. The nylon resin coating layer 5 eliminates the clearance between the female screw of the member screwed to the stainless steel bolt 1 and generates a large frictional resistance force with the female screw by the elastic restoring force to prevent loosening. .

ナイロン樹脂被覆層5は、ねじ部4全体に形成してもよいが、図1に示すように、ボルトの先端からねじ山で複数山(図示では3山)分だけコーティングしないようにすることが望ましい。ボルトのねじ込み時に先端にナイロン樹脂コーティングがあると、ねじ孔への挿入が困難となるが、上記のようにナットから飛び出すことになるねじ部4の先端部にはコーティングしないようにすることにより、初期のねじ込みが容易になる。   The nylon resin coating layer 5 may be formed on the entire threaded portion 4, but as shown in FIG. 1, it is necessary not to coat a plurality of threads (three threads in the figure) from the tip of the bolt. desirable. If there is a nylon resin coating at the tip when the bolt is screwed in, it will be difficult to insert into the screw hole, but by not coating the tip of the screw portion 4 that will jump out of the nut as described above, Initial screwing becomes easy.

ステンレス鋼ボルトは、強度が低いため、強く締め付けるとリラクゼーション(クリープ)により遅れ破壊的に軸部が伸びるという欠点があることは前述したとおりである。これを解決するために、ステンレス鋼の成分配合を特殊配合とすることにより、ボルトの強度を強度区分 10.8 相当まで引き上げることができる。その結果、トルク管理による緩みが生じないためのボルト軸力を与えることが可能となる。また、ボルトの疲労強度は引っ張り強さに比例するため、耐久性の向上を図ることができる。   Since stainless steel bolts have low strength, as described above, there is a drawback that the shaft portion is delayed and broken due to relaxation (creep) when tightened strongly. In order to solve this problem, the strength of the bolt can be increased to a strength category of 10.8 by using a special stainless steel component. As a result, it is possible to apply a bolt axial force that prevents loosening due to torque management. Further, since the fatigue strength of the bolt is proportional to the tensile strength, durability can be improved.

上記のようなダクロタイズド処理及びナイロン樹脂コーティングを施したステンレス鋼ボルトについて、塩水噴霧試験及び水道水浸漬試験を行った。塩水噴霧試験はJIS Z 2371 に規定される試験規格にしたがい、試験時間を 500 時間から 3000時間まで 500 時間 きざみで行い、変化の有無を確認した。また、水道水浸漬試験は、180 日間水道水に浸した場合の劣化または膨張の有無を確認した。それらの結果をそれぞれ表1及び表2に示す。   A stainless steel bolt subjected to the dacrotized treatment and the nylon resin coating as described above was subjected to a salt spray test and a tap water immersion test. The salt spray test was conducted according to the test standard stipulated in JIS Z 2371, and the test time was performed in increments of 500 hours from 500 hours to 3000 hours, and the presence or absence of changes was confirmed. In the tap water immersion test, the presence or absence of deterioration or expansion when immersed in tap water for 180 days was confirmed. The results are shown in Table 1 and Table 2, respectively.

Figure 0003176068
Figure 0003176068

Figure 0003176068
Figure 0003176068

塩水噴霧試験によれば、ダクロタイズド部においてわずかな白さびの発生が見られたものの、赤さびの発生はなかった。また、ナイロン樹脂コーティング部においては変化はなかった。水道水浸漬試験によれば、180 日間経過後も異常はなかった。   According to the salt spray test, although slight white rust was generated in the dacrotized portion, no red rust was generated. Moreover, there was no change in the nylon resin coating part. According to the tap water immersion test, there was no abnormality after 180 days.

1:ステンレス鋼ボルト
2:軸部
3:頭部
4:ねじ部(ナイロンコート部)
1: Stainless steel bolt 2: Shaft part 3: Head part 4: Screw part (nylon coat part)

Claims (1)

全体にダクロダイズド被膜が形成されるとともに、ねじ部にナイロン樹脂による被覆層が形成されてなることを特徴とするステンレス鋼ボルト。   A stainless steel bolt characterized in that a dacrodeized coating is formed on the entire surface and a coating layer of nylon resin is formed on a thread portion.
JP2012001648U 2012-03-26 2012-03-26 Stainless steel bolts Expired - Lifetime JP3176068U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017106300A (en) * 2015-12-07 2017-06-15 Jfeエンジニアリング株式会社 Self-lift type water area platform and gripping tool for use in the same as well as construction method of water area structure
KR20220021967A (en) * 2020-08-13 2022-02-23 하태홍 Bicycle handle with posture variable sturcture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017106300A (en) * 2015-12-07 2017-06-15 Jfeエンジニアリング株式会社 Self-lift type water area platform and gripping tool for use in the same as well as construction method of water area structure
KR20220021967A (en) * 2020-08-13 2022-02-23 하태홍 Bicycle handle with posture variable sturcture
KR102422641B1 (en) 2020-08-13 2022-07-21 하태홍 Bicycle handle with posture variable sturcture

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