JPS6338586A - Surface treatment of bolt - Google Patents
Surface treatment of boltInfo
- Publication number
- JPS6338586A JPS6338586A JP18228486A JP18228486A JPS6338586A JP S6338586 A JPS6338586 A JP S6338586A JP 18228486 A JP18228486 A JP 18228486A JP 18228486 A JP18228486 A JP 18228486A JP S6338586 A JPS6338586 A JP S6338586A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- wax
- spindle oil
- friction coefficient
- esterified
- 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
- 238000011282 treatment Methods 0.000 claims abstract description 12
- 238000005496 tempering Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000003960 organic solvent Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 238000007654 immersion Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 abstract description 8
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 239000003995 emulsifying agent Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- -1 alkaline earth metal sulfonate Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、焼戻し後のボルトを浸漬冷却と同時にワック
ス皮膜を形成して潤滑性を付与１せた表面処理方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a surface treatment method in which a tempered bolt is immersed and cooled and at the same time a wax film is formed thereon to impart lubricity.
（従来の技術）
一般にボルトの締付力は、設計上要求される締付力以上
で、かつ該ボルトの強度・サイズから決まるボルト破断
荷重以下であることが要求される。このボルトの締付力
を精度良く管理するためには、ボルトの表面の摩擦係数
を安定化させる必要がある。従来、ボルトの表面の摩擦
係数を安定化させる方法としては、次のような表面処理
技術が知られている、そのひとつは、鉱油中に有機リン
亜鉛含有硫黄化合物を添加した処理剤に、所定温度に加
熱きれたボルトを浸漬急冷し、ボルトの表面に軟金属化
合物を付着させる方法である（特公昭４７−２０８０６
号）。もうひとつは、ボルトに油溶性スルホン酸アルカ
リ土類金属塩と高級脂肪酸ンルピタンエステルと防錆剤
と鉱油との混合物を塗布する方法である（特公昭６０−
１９７９８号）。(Prior Art) In general, the tightening force of a bolt is required to be greater than the designed tightening force and less than the bolt breaking load determined by the strength and size of the bolt. In order to accurately manage the tightening force of the bolt, it is necessary to stabilize the coefficient of friction on the surface of the bolt. Conventionally, the following surface treatment techniques have been known as methods for stabilizing the coefficient of friction on the surface of bolts. One of them is to add a sulfur compound containing organophosphorous zinc to mineral oil in a specified manner. This is a method in which a heated bolt is immersed and rapidly cooled, and a soft metal compound is attached to the surface of the bolt (Japanese Patent Publication No. 47-20806
issue). The other method is to apply a mixture of an oil-soluble alkaline earth metal sulfonate, a higher fatty acid lupitan ester, a rust preventive agent, and mineral oil to the bolt (Special Publication Act 1986-
No. 19798).
（発明が解決しようとする問題点）
しかし、前者の方法によれば、ボルトの摩擦係数のばら
つきの尺度を示す標準偏差σが０．０２程度の値となり
、±３σの幅で摩擦係数が変動するとすれば摩擦係数の
上限値と下限値との差が０．１２となシ、ボルトに要求
される摩擦係数の安定性としては必ずしも十分な値では
々い。これば、±３σの幅における摩擦係数の上、下限
値の差が０．１２程度であると、ボルトの締付力のばら
つきが許容値を超えることになり、この場合はボルトの
強度向上、サイズアップによるボルト破断荷重の向上が
必要になシ重量増加をもたらすからである。(Problem to be solved by the invention) However, according to the former method, the standard deviation σ, which is a measure of the variation in the friction coefficient of bolts, becomes a value of about 0.02, and the friction coefficient fluctuates within a range of ±3σ. If so, the difference between the upper and lower limits of the friction coefficient would be 0.12, which is not necessarily a sufficient value for the stability of the friction coefficient required of the bolt. In other words, if the difference between the upper and lower limits of the friction coefficient in the range of ±3σ is about 0.12, the variation in bolt tightening force will exceed the allowable value, and in this case, the strength of the bolt will be improved. This is because increasing the size requires an increase in the bolt breaking load, resulting in an increase in weight.
また、後者の方法によｎば、ボルトの摩擦係数のばらつ
きとしてσ＝ ｏ、 ｏ ｏ ｓ程度の値となり十分な
摩擦係数の安定性が得らｎるが、前工程として表面処理
前ｔ′こボルトの表面に付着している油脂分をきｎいに
除去する必要があシ、ボルトの熱処理後に脱脂・脱スケ
ール工程を追加しなけｎばならないために、生産性およ
びコスト面から非常に不利になる。In addition, according to the latter method, the variation in the friction coefficient of the bolt is approximately σ = o, o o s, and sufficient stability of the friction coefficient can be obtained. It is necessary to thoroughly remove the oil and fat adhering to the surface of the bolt, and a degreasing and descaling process must be added after the bolt is heat treated, which is very difficult from a productivity and cost perspective. be at a disadvantage.
本発明は上記問題点を解消するもので、ボルト表面にエ
ステル化酸化ワックスを固着させた後にスピンドル油を
塗布することにより、下地のワックスと塗布したスピン
ドル油との相乗効果によってボルトの摩擦係数を著しく
安定化させる処理方法を提供しようとするものである。The present invention solves the above-mentioned problems by applying spindle oil after fixing esterified oxidized wax to the bolt surface, thereby increasing the friction coefficient of the bolt through the synergistic effect of the underlying wax and the applied spindle oil. The aim is to provide a treatment method that provides significant stabilization.
（問題点を解決するための手段）
この目的を達成するため、本発明の手段は、ボルトを焼
入れしたのち焼戻し温度の状態のままのボルトを直接処
理液に浸漬して冷却する。(Means for solving the problem) In order to achieve this object, the means of the present invention is to quench the bolt and then directly immerse the bolt, which is still at the tempering temperature, in a treatment liquid to cool it.
この処理液としては、有機溶剤にエステル化酸化ワック
スを１０〜３０ｗｔ％ 、乳化剤としてブチルカルビト
ールを２〜５ ｗｔ％添加したものを水で濃度１０ｗｔ
％以上に希釈したものを使用する。浸漬冷却後、ボルト
の表面にスピンドル油を塗布する。The treatment solution was prepared by adding 10 to 30 wt% of esterified oxidized wax to an organic solvent and 2 to 5 wt% of butyl carbitol as an emulsifier, and adding water to a concentration of 10 wt%.
% or more. After immersion cooling, apply spindle oil to the bolt surface.
本発明においてエステル化酸化ワックスを１０〜３０ｗ
ｔチとしたのは、１０Ｗｔチ以下では摩擦係数安定化効
果が小さく、３０ｗｔ％以上ではボルト処理時に該ワッ
クスが容易に固形化するからである。また、上記エステ
ル系ワックスを含む液体を水で１０’ｗｔ％以上の濃度
に希釈したのは、１（ｈｖｔチ以下の濃度では所要の摩
擦係数安定化効果が得られないからである。In the present invention, 10 to 30 w of esterified oxidized wax is used.
The reason for choosing t is that below 10 wt %, the effect of stabilizing the friction coefficient is small, and above 30 wt %, the wax easily solidifies during bolt processing. Further, the reason why the liquid containing the ester wax is diluted with water to a concentration of 10'wt% or more is because the required friction coefficient stabilizing effect cannot be obtained at a concentration of 1 (hvt) or less.
（作 用）
浸漬処理されたボルトは、表面にワックス皮膜が薄く付
着する。このため付着ワックスにより若干の摩擦係数安
定効果が期待できるが、ワックス皮膜が極めて薄く、か
つボルトの表面全域にわたって完全に、均一に付着しな
いので、十分な摩擦係数安定効果が得らｎるとは言い難
い。こｎを補うために、浸漬処理後のボルトにスピンド
ル油を全面塗布する。これにより、ボルトをワックス皮
膜のみ又はスピンドル油のみで処理した場合にくらべて
、ボルトに対する摩擦係数安定効果が相乗的に大幅に向
上する。(Function) Bolts that have been dipped have a thin wax film attached to their surfaces. For this reason, it is possible to expect a slight effect of stabilizing the coefficient of friction due to the attached wax, but since the wax film is extremely thin and does not adhere completely and uniformly over the entire surface of the bolt, it is unlikely that a sufficient effect of stabilizing the coefficient of friction will be obtained. It's hard to say. To compensate for this, spindle oil is applied to the entire surface of the bolt after the immersion treatment. As a result, the effect of stabilizing the friction coefficient on the bolt is synergistically significantly improved compared to when the bolt is treated with only a wax film or only with spindle oil.
（実施例） 以下に本発明の一実施例を詳細に説明する。(Example) An embodiment of the present invention will be described in detail below.
８０Ｍ４４０材を用いてＭ１２Ｘ１．２５ボルトを成形
し、これを８８０℃で焼入ｎした後、５３０℃にて９０
分間焼戻しを行った。焼戻し終了後、ただちに５３０℃
に加熱されているボルトを、エステル化ば化ワックス２
０重址チ、ブチルカルビトール２重量％、残部布（幾Ｇ
剤より成る原液を水にて２０重量％の４度に希釈した皮
膜処理液に浸漬し急冷した。M12
Tempering was performed for a minute. Immediately after tempering, heat to 530℃
The bolt is heated to esterified wax 2
0 weight %, butyl carbitol 2% by weight, remainder cloth (a few grams
A stock solution consisting of the agent was immersed in a film treatment solution diluted to 20% by weight to 4 degrees with water and rapidly cooled.
次に、このボルトをスピンドル油の中に浸漬して塗布し
た。The bolt was then dipped in spindle oil and coated.
その後、上記のようにして表面処理したボルトの摩擦係
数を測定した。測定試験は、用鉄計量製のボルト試験機
を用いて行い、軸力が６トンに達するまで締付けたとき
のトルクを測定した。ボルトの摩擦係数μは次式（１）
より算出した。Thereafter, the friction coefficient of the bolt whose surface was treated as described above was measured. The measurement test was carried out using a bolt testing machine manufactured by Yotetsu Keizai Co., Ltd., and the torque was measured when the bolt was tightened until the axial force reached 6 tons. The friction coefficient μ of the bolt is the following formula (1)
Calculated from.
ここに Ｔ：トルク、Ｑ：軸力、Ｐ：ピンチ、ｄ２：ね
じ有効径、ｄｗ：座面等価直径、α：ねじ山中角。Here, T: Torque, Q: Axial force, P: Pinch, d2: Thread effective diameter, dw: Seat surface equivalent diameter, α: Thread center angle.
試験は同一処理ロンドのホルト３０本を用いて行い、摩
擦係数μの平均値と標準偏差σを算出した。The test was conducted using 30 holts of the same treatment, and the average value and standard deviation σ of the friction coefficient μ were calculated.
この試験結果を第１表に示す。第１表には併せて、上記
ボルトと同一材質および同一形状のボルトについて下記
■、■、■の処理をそルぞれ行い、各処理品に対して上
記と同様にして摩擦係数μを測定した結果も示す。The test results are shown in Table 1. Table 1 also shows that bolts made of the same material and shape as the above bolts were subjected to the following treatments, and the friction coefficient μ was measured for each treated item in the same manner as above. The results are also shown.
■ 焼戻し後の皮膜処理は行わずに、水中に浸漬して急
冷した無処理品。■ Untreated products that are immersed in water and rapidly cooled without undergoing any film treatment after tempering.
■ 上記無処理品についてスピンドル油を塗布したスピ
ンドル油塗布品。■ A product coated with spindle oil, which is the same as the untreated product above.
■ 焼戻し後の皮膜処理を行い、その後スピンドル油を
塗布しない皮膜処理品。■ Film-treated products that undergo film treatment after tempering and do not apply spindle oil afterwards.
第１表
第１表の結果よシ明らかなように、本発明品は、無処理
品はもとよシ、スピンドル油塗布のみのもの、または皮
膜処理単独のものにくらべて摩擦係数μの標準偏差（ば
らつきの程度）σが■以下に低下しており、本発明品は
下地層のワックスと最表面層のスピンドル油との相乗的
な作用によシ、摩擦係数安定効果が著しく向上している
ことが判る。As is clear from the results in Table 1, the product of the present invention has a standard friction coefficient μ compared to the untreated product, the spindle oil coating only, or the film treatment only. The deviation (degree of variation) σ has been reduced to below ■, and the product of the present invention has a significantly improved friction coefficient stabilizing effect due to the synergistic effect of the wax in the base layer and the spindle oil in the outermost layer. I know that there is.
（発明の効果）
叙上のように本発明によ扛ば、ワックスとスピンドル油
との相乗効果によりボルト表面の摩擦係数が従来処理品
に比べて著しく安定化し、脱脂・脱スケール工程を追加
すること々くボルトの締付力を高精度に管理することが
できる。(Effects of the invention) As described above, according to the present invention, the friction coefficient of the bolt surface is significantly stabilized compared to conventionally treated products due to the synergistic effect of wax and spindle oil, and a degreasing/descaling process is added. The tightening force of bolts can be controlled with high precision.
したがってボルトの締付力のばらつきが極力小さくなる
結果、設計上ボルトの強度低下、サイズダウンが可能と
なり、重量軽減およびコスト低減の効果を期待すること
ができる。Therefore, variations in the tightening force of the bolts are minimized, and as a result, it is possible to reduce the strength and size of the bolts in terms of design, and the effects of weight and cost reductions can be expected.
Claims (1)
溶剤にエステル化酸化ワックスを１０〜３０ｗｔ％及び
ブチルカルビトールを２〜５ｗｔ％添加したものを水で
濃度１０ｗｔ％以上に希釈した処理液に浸漬冷却し、し
かる後、スピンドル油を塗布することを特徴とするボル
トの表面処理方法。The heated bolt immediately after tempering is treated with a treatment solution prepared by adding 10 to 30 wt% of esterified oxidized wax and 2 to 5 wt% of butyl carbitol to an organic solvent and diluting it with water to a concentration of 10 wt% or more. A bolt surface treatment method characterized by immersion cooling and then applying spindle oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18228486A JPS6338586A (en) | 1986-08-02 | 1986-08-02 | Surface treatment of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18228486A JPS6338586A (en) | 1986-08-02 | 1986-08-02 | Surface treatment of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6338586A true JPS6338586A (en) | 1988-02-19 |
Family
ID=16115583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18228486A Pending JPS6338586A (en) | 1986-08-02 | 1986-08-02 | Surface treatment of bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338586A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725840U (en) * | 1993-10-25 | 1995-05-16 | 株式会社名和電機 | Heating and cooling equipment for hot and cold serving cars |
| US5599250A (en) * | 1994-04-06 | 1997-02-04 | Zexel Corporation | Torque distribution type differential gear system |
| US5669844A (en) * | 1994-11-16 | 1997-09-23 | Toyota Jidosha Kabushiki Kaisha | Lubrication system for a parallel-axis differential |
| JP5830765B1 (en) * | 2014-07-31 | 2015-12-09 | 株式会社青山製作所 | Screw lubricant |
-
1986
- 1986-08-02 JP JP18228486A patent/JPS6338586A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725840U (en) * | 1993-10-25 | 1995-05-16 | 株式会社名和電機 | Heating and cooling equipment for hot and cold serving cars |
| US5599250A (en) * | 1994-04-06 | 1997-02-04 | Zexel Corporation | Torque distribution type differential gear system |
| US5669844A (en) * | 1994-11-16 | 1997-09-23 | Toyota Jidosha Kabushiki Kaisha | Lubrication system for a parallel-axis differential |
| JP5830765B1 (en) * | 2014-07-31 | 2015-12-09 | 株式会社青山製作所 | Screw lubricant |
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