JP2847291B2 - Surface treatment method for fastening parts - Google Patents
Surface treatment method for fastening partsInfo
- Publication number
- JP2847291B2 JP2847291B2 JP1038322A JP3832289A JP2847291B2 JP 2847291 B2 JP2847291 B2 JP 2847291B2 JP 1038322 A JP1038322 A JP 1038322A JP 3832289 A JP3832289 A JP 3832289A JP 2847291 B2 JP2847291 B2 JP 2847291B2
- Authority
- JP
- Japan
- Prior art keywords
- axial force
- fastening
- orthosilicate
- composite
- torque
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 4
- 238000004381 surface treatment Methods 0.000 title claims description 3
- 239000002131 composite material Substances 0.000 claims description 18
- 229920002554 vinyl polymer Polymers 0.000 claims description 12
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 11
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000576 coating method Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- -1 benzyl orthosilicate Phenethyl orthosilicate Chemical compound 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 229920001290 polyvinyl ester Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- BRXOKRLIIVYICJ-UHFFFAOYSA-N butoxy(trihydroxy)silane Chemical compound CCCCO[Si](O)(O)O BRXOKRLIIVYICJ-UHFFFAOYSA-N 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- HKJJPWLIZHQHFX-UHFFFAOYSA-N trihydroxy(octoxy)silane Chemical compound CCCCCCCCO[Si](O)(O)O HKJJPWLIZHQHFX-UHFFFAOYSA-N 0.000 description 1
- KIRWIETUDITSMO-UHFFFAOYSA-N trihydroxy(phenoxy)silane Chemical compound O[Si](O)(O)OC1=CC=CC=C1 KIRWIETUDITSMO-UHFFFAOYSA-N 0.000 description 1
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はボルト・ナット等の締結部品の締結面に特定
の塗布剤をコーティングして締結トルクに対する軸力低
下を防止を図る締結部品の表面処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention coats a specific coating agent on a fastening surface of a fastening component such as a bolt or a nut to prevent a decrease in axial force with respect to a fastening torque. Regarding the processing method.
［従来の技術］ ボルト・ナット等の締結部品を締結するに当たり、一
般に、締付トルクに対する軸力がばらついたのでは締結
部品の破損等が生じてしまい、これを防ぐためには一定
の締付トルクに対する一定の軸力を得ることが望ましい
とされている。締結トルクに対する上述の軸力は通常締
結部品の締結面の表面状態によって大きく影響され、特
に摩擦係数のバラツキによって大きく影響される。ま
た、摩擦係数自体も締結面の油脂の付着、メッキの種類
等によって大きく変化する。[Prior Art] In fastening fastening parts such as bolts and nuts, in general, if the axial force with respect to the tightening torque varies, the fastening parts may be damaged, etc. To prevent this, a certain tightening torque is required. It is desired to obtain a constant axial force with respect to. The above-described axial force with respect to the fastening torque is usually greatly affected by the surface condition of the fastening surface of the fastening part, and particularly greatly affected by the variation of the friction coefficient. Further, the friction coefficient itself greatly changes depending on the adhesion of fats and oils on the fastening surface, the type of plating, and the like.
そこで、締結面の表面状態に影響されずに摩擦係数を
一定に保持するために、各種塗布剤の締結面へのコーテ
ィングが試みられている。Therefore, in order to keep the coefficient of friction constant without being affected by the surface condition of the fastening surface, attempts have been made to coat various fastening agents on the fastening surface.
この種の塗布剤として従来、シリコン、パラフィン、
ワックス等の潤滑剤が用いられているが、これらの潤滑
剤では摩擦係数が大幅に低下し過ぎる傾向があり、この
ため、トルク変化にしたがって軸力が大きく変化すると
いう難点がある。また、これらの潤滑剤では締結面から
の剥離が起こりやすく、このため品質の保持にも難点が
ある。Conventionally, silicone, paraffin,
Although lubricants such as wax are used, the friction coefficient of these lubricants tends to be too low, and therefore, there is a problem that the axial force greatly changes according to the torque change. In addition, these lubricants are liable to peel off from the fastening surface, and there is also a problem in maintaining quality.
さらに、この種の塗布剤として従来、有機合成樹脂も
用いられているが、これら樹脂では締結部品の締め付け
によって摩耗しやすく、このためコーティングによる充
分な効果が得られず、特に締結部品の再使用の場合には
もはや所定の効果はほとんど期待できない。Furthermore, organic synthetic resins have also been used as a coating agent of this type, but these resins are liable to wear due to tightening of the fastening parts, so that the coating cannot provide a sufficient effect, and particularly, the reuse of the fastening parts. In this case, the desired effect can hardly be expected.
［発明が解決しようとする問題点］ そこで、本発明の目的は締結部品の締結面に特定の塗
布剤をコーティングすることにより所定の締結トルクに
対して均一な軸力を発生せしめ、かつ耐久性に富むのみ
ならず、再使用も可能であり、前述の公知技術に存する
欠点を改良した締結部品の表面処理方法を提供すること
にある。[Problems to be Solved by the Invention] Accordingly, an object of the present invention is to generate a uniform axial force for a predetermined fastening torque by coating a fastening surface of a fastening part with a specific coating agent, and to improve durability. Another object of the present invention is to provide a surface treatment method for a fastening part which is not only rich in replenishment but also reusable and has improved the disadvantages of the above-mentioned known art.
［問題点を解決するための手段］ 前述の目的を達成するため、本発明によれば、締結部
品の締結面に、分子内にヒドロキシル基を有するポリビ
ニルアセタール類と、オルトシリケートとを含む複合剤
を塗布してトルクの安定化を得ること、また締結部品の
繰り返し使用時にトルクに対する軸力低下を防止するこ
とを特徴とする。[Means for Solving the Problems] In order to achieve the above-mentioned object, according to the present invention, a composite agent comprising a polyvinyl acetal having a hydroxyl group in a molecule and an orthosilicate on a fastening surface of a fastening component Is applied to stabilize the torque and prevent a decrease in the axial force with respect to the torque when the fastening part is repeatedly used.
前述の分子内にヒドロキシル基を有するポリビニルア
セタール類としては、ポリビニルエステルの加水分解物
をホルムアルデヒド、アセトアルデヒド、ブチルアルデ
ヒド等でアセタール化して得られるポリビニルホルマー
ル、ポリビニルアセタール、ポリビニルブチラール等が
挙げられる。ここで用いられるポリビニルエステルは数
平均重合度250〜1500のものが好ましく、また、ヒドロ
キシル基が必ず残存していなければならない。Examples of the polyvinyl acetal having a hydroxyl group in the molecule include polyvinyl formal, polyvinyl acetal, and polyvinyl butyral obtained by acetalizing a hydrolyzate of a polyvinyl ester with formaldehyde, acetaldehyde, butyraldehyde, and the like. The polyvinyl ester used here preferably has a number average degree of polymerization of 250 to 1500, and a hydroxyl group must always remain.
さらに、ポリビニルアセタール類との組み合わせで使
用されるオルトシリケートとしてはメチルオルトシリケ
ート、エチルオルトシリケート、ｎ−プロピルオルトシ
リケート、ｎ−プチルオルトシリケート、ｎ−オクチル
オルトシリケート、フエニルオルトシリケート、ベンジ
ルオルトシリケート、フェネチルオルトシリケート、ア
リルオルトシリケート、メタアリルオルトシリケート等
である。このようなオルトシリケートは塩酸、リン酸等
の酸触媒の存在下、かつ加熱条件下、ポリビニルアセタ
ール類と共重合される。Further, as the orthosilicate used in combination with the polyvinyl acetal, methyl orthosilicate, ethyl orthosilicate, n-propyl orthosilicate, n-butyl orthosilicate, n-octyl orthosilicate, phenyl orthosilicate, benzyl orthosilicate Phenethyl orthosilicate, allyl orthosilicate, methallyl orthosilicate and the like. Such an orthosilicate is copolymerized with polyvinyl acetal in the presence of an acid catalyst such as hydrochloric acid or phosphoric acid and under heating conditions.
上述の分子内にヒドロキシル基を有するポリビニルア
セタール類とオルトシリケートとを含む複合体は締結部
品の締結面に塗布され、トルクの安定化効果を発揮し、
締結部品の繰り返し使用に対して軸力を低下させること
がない。The above-described composite containing a polyvinyl acetal having a hydroxyl group in the molecule and orthosilicate is applied to the fastening surface of the fastening part, and exhibits a torque stabilizing effect,
The axial force is not reduced by repeated use of the fastening part.
［作用］ 本発明は分子内にヒドロキシル基を有するポリビニル
アセタール類と、オルトシリケート類とを必須成分とし
て含有する複合剤を用いることにより、締付トルクに対
する軸力低下を防止し、トルクの安定化を達成する。さ
らに、締結部品を繰り返し使用する場合に同じ締め付け
トルクで軸力が増大する。[Action] The present invention uses a composite agent containing, as essential components, a polyvinyl acetal having a hydroxyl group in a molecule and an orthosilicate to prevent a decrease in axial force with respect to a tightening torque and stabilize the torque. To achieve. Further, when the fastening part is used repeatedly, the axial force increases with the same tightening torque.
上述のポリビニルアセタール類とオルトシリケートの
配合比率は重量比で2:1〜1:1であることが好ましく、ポ
リビニルアセタール類の配合比率が上述の比率よりも高
いと、塗膜の耐摩耗性が低下し、オルトシリケートの配
合比率が高いと、塗膜の締結面への密着力が低下し、か
つ軸力の安定性も損なう。The compounding ratio of the polyvinyl acetal and the orthosilicate is preferably 2: 1 to 1: 1 by weight, and when the compounding ratio of the polyvinyl acetal is higher than the above ratio, the abrasion resistance of the coating film is reduced. If the ratio is low and the mixing ratio of orthosilicate is high, the adhesion of the coating film to the fastening surface is reduced, and the stability of the axial force is also impaired.
［発明の実施例］ 以下、本発明を実施例により詳述する。Hereinafter, the present invention will be described in detail with reference to examples.
実施例 （Ａ）複合剤の調製 次の複合剤（１）を調製し、比較例として複合剤
（２）を調製した。Example (A) Preparation of composite agent The following composite agent (1) was prepared, and as a comparative example, composite agent (2) was prepared.
複合剤 １ ポリビニルブチラール（BL−１積水化学製） （ポリビニルアセタール類） 30g エチルシリケート（シリカ分） 25g アルコール系溶剤 160g 塩酸 1g 複合剤 ２ アルマブックスXV−Z2085（三井東圧製） （アクリル共重合体としてのアクリルエマルション）
22.5g スノーブック20（日産化学製） （シリカ分としてのコライダルシリカ） 7.5g シラン化合物（KBM503信越化学製） 0.1g （Ｂ）実験 １ 上述の複合剤１および２をそれぞれ、ボルト（MIO P
I.5JIS2級有色クロメート）のネジ部（締結面）にディ
ッピングによりコーティングし、120℃の温度で３分間
熱風乾燥の後、締付300kgf・cmの軸力（ton）を測定
し、さらに、未塗布のブランクについても同様にして測
定し結果をそれぞれ表−１に示した。Composite 1 Polyvinyl butyral (BL-1 manufactured by Sekisui Chemical) (Polyvinyl acetal) 30 g Ethyl silicate (silica content) 25 g Alcohol-based solvent 160 g Hydrochloric acid 1 g Composite 2 Alma Books XV-Z2085 (Mitsui Toatsu) (Acrylic Co., Ltd.) Acrylic emulsion as coalescence)
22.5 g Snowbook 20 (Nissan Chemical) (colloidal silica as silica) 7.5 g Silane compound (KBM503 Shin-Etsu Chemical) 0.1 g (B) Experiment 1 Each of the above-mentioned composite agents 1 and 2 was bolted (MIO P
I.5 JIS class 2 colored chromate) is coated by dipping on the thread (fastening surface), dried with hot air at a temperature of 120 ° C for 3 minutes, and measured with a 300 kgf · cm axial force (ton) for tightening. The coating blank was measured in the same manner, and the results are shown in Table 1.
表−１ 表−１から明らかなように、本発明にかかる複合剤１
および比較例の複合剤２はいずれもブランクよりも軸力
が大きく、かつバラツキ範囲Ｒも、ブランクについては
Ｒ＝0.20であるのに対してＲ＝0.05と小さく、締付トル
クに対する軸力が安定している。Table 1 As is clear from Table 1, the composite 1 according to the present invention was used.
The composite agent 2 of Comparative Example and Comparative Example 2 each had a larger axial force than the blank, and the variation range R was as small as R = 0.05 for the blank, whereas R = 0.20 for the blank, and the axial force against the tightening torque was stable. doing.
（Ｃ）実験 ２ 上述の複合剤１および比較例の複合剤２をそれぞれ、
フランジナット（MIO、P1.25）の締結面に実験１と同様
にして塗布乾燥し、かつ比較例としてトルカ（Ａ−Ｈ、
日本油脂製）を実験１と同様にして塗布乾燥の後、それ
ぞれ締付300kgf・cmの軸力（ton）を測定し、さらに前
記ナットを取り外し、再び同様にして締めつけて軸力を
測定し、この操作を２回、３回と実施して軸力の変動を
観察し、結果を表−２に示した。なお、同時に未塗布の
ブランクについても同様にして測定し、結果を表−２に
示した。(C) Experiment 2 The above-described composite agent 1 and the composite agent 2 of the comparative example were respectively
Coating and drying were performed on the fastening surface of the flange nut (MIO, P1.25) in the same manner as in Experiment 1, and Toruca (AH,
After applying and drying Nippon Yushi Co., Ltd. in the same manner as in Experiment 1, the axial force (ton) of 300 kgf · cm of tightening was measured, the nut was removed, and the axial force was measured by tightening again in the same manner. This operation was performed twice and three times, and the fluctuation of the axial force was observed. The results are shown in Table-2. The uncoated blank was measured in the same manner, and the results are shown in Table 2.
表−２ 表−２の比較例について、実験番号（１−３回目）に
対する軸力（ｔ）の関係を第１図に示し、同様にして複
合剤１および２についても実験番号（１−３回目）に対
する軸力（ｔ）の関係をそれぞれ第２図および第３図に
示し、さらにブランクについても同様にして第４図に示
した。Table 2 For the comparative examples in Table 2, the relationship of the axial force (t) with respect to the experiment number (1st to 3rd times) is shown in FIG. The relationship of the axial force (t) with respect to the second time is shown in FIGS. 2 and 3, respectively, and the blank is similarly shown in FIG.
これら表−２および第１〜４図から、比較例（第１
図）およびブランク（第４図）については繰り返し使用
に対して軸力が低下し（表−２では軸力変動がそれぞ
れ、−0.22および−0.23、第１図および第４図ではグラ
フが回数を重ねる毎に下降）、かつ複合剤１（第２図）
については繰り返し使用に対して軸力が＋0.1に増大し
ている。比較例の複合剤２（第３図）については繰り返
し使用に対して軸力が増大しているものの＋0.02程度で
ある。このため、本発明にかかる複合剤では繰り返し使
用しても軸力は低下せず、安定化していることがわか
る。From these Table-2 and FIGS. 1-4, the comparative example (first
(Fig. 4) and the blank (Fig. 4) decrease in axial force with repeated use (in Table 2, the axial force fluctuations are -0.22 and -0.23, respectively), and in Figs. Lowers each time it overlaps) and composite agent 1 (Fig. 2)
With respect to, the axial force increases to +0.1 with repeated use. In the case of the composite agent 2 of the comparative example (FIG. 3), although the axial force increased with repeated use, it was about +0.02. For this reason, it can be seen that the axial force does not decrease and the composite agent according to the present invention is stabilized even when repeatedly used.
［発明の効果］ 以上のとおり、本発明方法によれば、所定の締付トル
クに対して変化の少ない、均一な安定化した軸力を発生
せしめ、このため締結部品の破損を防ぎ、また時間がた
っても軸力の低下を防ぎ、締結部品のゆるみを防止す
る。[Effects of the Invention] As described above, according to the method of the present invention, a uniform and stable axial force with little change with respect to a predetermined tightening torque is generated. Prevents the axial force from dropping and prevents loosening of fasteners.
さらに、締結部品をいったん取り外し、再度組み付け
て繰り返し使用しても、軸力の低下は起こらずさらに増
加することにより、上述と同様に安定化した軸力が得ら
れ、常に一定の締付トルク管理を可能とする。Furthermore, even if the fastening parts are removed once, re-assembled and used repeatedly, the axial force does not decrease and increases further, so that the stabilized axial force is obtained as described above, and a constant tightening torque management is always performed. Is possible.
化学式等を記した書面 Documents describing chemical formulas, etc.
第１〜４図はいずれも実験２における繰り返し使用時の
軸力変動のグラフを示し、第１図は比較例、第２図およ
び第３図は本発明にかかる複合剤１および２、第４図は
ブランクについてのそれぞれ、軸力変動を表したグラフ
である。1 to 4 show graphs of axial force fluctuations during repeated use in Experiment 2. FIG. 1 is a comparative example, and FIGS. 2 and 3 are composite agents 1 and 2 according to the present invention. The figure is a graph showing the axial force fluctuation for each blank.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C10M 107/24 C10M 107/50 C10M 145/04 C10M 155/02──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) C10M 107/24 C10M 107/50 C10M 145/04 C10M 155/02
Claims (1)
ル基を有するポリビニルアセタール類とオルトシリケー
トとを含む複合剤を塗布して締結部品の繰り返し使用時
にトルクに対する軸力低下を防止することを特徴とする
締結部品の表面処理方法。An object of the present invention is to apply a composite agent containing a polyvinyl acetal having a hydroxyl group in a molecule and an orthosilicate to a fastening surface of a fastening part to prevent a decrease in axial force against torque when the fastening part is repeatedly used. Characteristic surface treatment method for fastening parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038322A JP2847291B2 (en) | 1989-02-20 | 1989-02-20 | Surface treatment method for fastening parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038322A JP2847291B2 (en) | 1989-02-20 | 1989-02-20 | Surface treatment method for fastening parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02218795A JPH02218795A (en) | 1990-08-31 |
| JP2847291B2 true JP2847291B2 (en) | 1999-01-13 |
Family
ID=12522046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1038322A Expired - Lifetime JP2847291B2 (en) | 1989-02-20 | 1989-02-20 | Surface treatment method for fastening parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2847291B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10342907A1 (en) * | 2003-09-17 | 2005-04-21 | Pfeiffer Vacuum Gmbh | Vacuum pump with fast rotating rotor |
| JP4837921B2 (en) * | 2005-01-26 | 2011-12-14 | メイラ株式会社 | Friction coefficient stabilizer and fastening member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5385830A (en) * | 1977-01-06 | 1978-07-28 | Toa Paint Co Ltd | Frictionnless primer |
| JPS55152794A (en) * | 1979-05-17 | 1980-11-28 | Shiro Hasegawa | Torque stabilizer and treatment for stabilization of torque of clamping material |
-
1989
- 1989-02-20 JP JP1038322A patent/JP2847291B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02218795A (en) | 1990-08-31 |
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