JPH01237128A - Manufacture of drawing bush - Google Patents
Manufacture of drawing bushInfo
- Publication number
- JPH01237128A JPH01237128A JP33101488A JP33101488A JPH01237128A JP H01237128 A JPH01237128 A JP H01237128A JP 33101488 A JP33101488 A JP 33101488A JP 33101488 A JP33101488 A JP 33101488A JP H01237128 A JPH01237128 A JP H01237128A
- Authority
- JP
- Japan
- Prior art keywords
- fitting
- fitment
- outer cylinder
- cylinder
- chemical conversion
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- IQBJFLXHQFMQRP-UHFFFAOYSA-K calcium;zinc;phosphate Chemical compound [Ca+2].[Zn+2].[O-]P([O-])([O-])=O IQBJFLXHQFMQRP-UHFFFAOYSA-K 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 238000005238 degreasing Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 57
- 239000002184 metal Substances 0.000 claims description 57
- 239000000126 substance Substances 0.000 claims description 36
- 239000000853 adhesive Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 238000007739 conversion coating Methods 0.000 claims description 16
- 238000004073 vulcanization Methods 0.000 claims description 5
- 238000007517 polishing process Methods 0.000 claims 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 3
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 abstract description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 abstract description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 abstract description 2
- 229940005991 chloric acid Drugs 0.000 abstract description 2
- 235000019691 monocalcium phosphate Nutrition 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- 229910002651 NO3 Inorganic materials 0.000 abstract 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical compound ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 230000000593 degrading effect Effects 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 235000010344 sodium nitrate Nutrition 0.000 abstract 1
- 239000004317 sodium nitrate Substances 0.000 abstract 1
- MFXMOUUKFMDYLM-UHFFFAOYSA-H zinc;diphosphate Chemical compound [Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O MFXMOUUKFMDYLM-UHFFFAOYSA-H 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 150000003839 salts Chemical class 0.000 description 9
- 238000007747 plating Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 6
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 6
- 229910000165 zinc phosphate Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 206010058109 Hangnail Diseases 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007746 phosphate conversion coating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- LKCUKVWRIAZXDU-UHFFFAOYSA-L zinc;hydron;phosphate Chemical compound [Zn+2].OP([O-])([O-])=O LKCUKVWRIAZXDU-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Springs (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、自動車等の懸架装置、ステアリング装置等
において各種ロッドの連結部緩衝用として用いられる絞
りブツシュの製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a throttle bush used as a buffer for connecting parts of various rods in suspension systems, steering systems, etc. of automobiles.
通常、この種の絞りブツシュは、第１図に示すように、
内筒金具１に外筒金具２を外嵌し、両金具１，２の間隙
に未加硫のスリーブ用ゴムを注入し、加硫によりゴムス
リーブ３化して接着したのち、外筒金具２に対して絞り
加工を施して縮径するか、もしくは内筒金具１に対して
拡管加工を施して拡径することにより、内筒１．外筒２
間のゴムスリーブ３を軸直角方向に圧縮して製造される
。この種の絞りブツシュの具体的使用態様としては、例
えば第２図に示すように、自動車のシャシ−５を板ばね
６を介して車軸７に載せる懸架装置において、板ばね６
の両端部とシャシ−５とを連結する個所Ｃに使用する態
様があげられる。Usually, this type of aperture bushing is as shown in Figure 1.
Fit the outer cylindrical metal fitting 2 onto the inner cylindrical metal fitting 1, inject unvulcanized rubber for the sleeve into the gap between the two metal fittings 1 and 2, turn it into a rubber sleeve 3 by vulcanization and bond it, and then attach it to the outer cylindrical metal fitting 2. The inner cylinder 1. Outer cylinder 2
It is manufactured by compressing the rubber sleeve 3 between them in the direction perpendicular to the axis. For example, as shown in FIG. 2, this type of throttle bush is used in a suspension system in which an automobile chassis 5 is mounted on an axle 7 via a leaf spring 6.
An example of this embodiment is that it is used at a point C that connects both ends of the chassis 5 and the chassis 5.
ところで、上記のようにして得られる絞りブツシュにお
いて、内筒金具１．外筒金具２には、予め防錆処理がな
されていないのが通例であり、それらに対する防錆は、
ブツシュの製造後に全体を防錆塗料中に浸漬して行われ
る。これはつぎのような理由による。すなわち、内外筒
金具１，２に対して、仮に金属めっき等の防錆処理を予
め施しめっき皮膜を形成しても、内外筒金具１，２に対
する拡径、縮径加工等の絞り加工時に、めっき皮膜に対
して引張応力、圧縮応力が作用してめっき皮膜が剥離し
てしまう。めっき皮膜に代えて、リン酸亜鉛やリン酸マ
ンガンからなる化成皮膜を形成しても内筒１．外筒２に
対する加工時に化成皮膜の剥離が生じる。したがって、
従来から、内外筒金具１．２に対する防錆は、前記のよ
うに絞りブツシュ製造後、全体を防錆塗料中に浸漬して
行っているのが実情であり、絞り加工を考慮すると、内
外筒金具１．２に対してめっき皮膜や化成皮膜を形成す
ることは無駄であるという固定観念が形成されている。By the way, in the drawing bush obtained as described above, the inner cylinder fitting 1. It is customary that the outer cylinder fitting 2 is not subjected to anti-corrosion treatment in advance, and the anti-rust treatment for them is as follows.
This is done by immersing the entire bush in anti-rust paint after it is manufactured. This is due to the following reasons. That is, even if the inner and outer cylindrical fittings 1 and 2 are subjected to anti-corrosion treatment such as metal plating in advance to form a plating film, when the inner and outer cylindrical fittings 1 and 2 are subjected to drawing processing such as diameter expansion or diameter reduction, Tensile stress and compressive stress act on the plating film, causing it to peel off. Even if a chemical conversion film made of zinc phosphate or manganese phosphate is formed instead of a plating film, the inner cylinder 1. Peeling of the chemical conversion film occurs when the outer cylinder 2 is processed. therefore,
Traditionally, rust prevention for the inner and outer cylinder fittings 1.2 has been carried out by immersing the entire body in anti-rust paint after manufacturing the drawn bushing as described above. A fixed idea has been formed that it is wasteful to form a plating film or a chemical conversion film on the metal fittings 1.2.
しかしながら、上記防錆塗料による塗装では、内外筒金
具１，２に対して充分な防錆を行うことができないため
、水、塩水等がふりかかるような腐食条件下における使
用において、ゴムスリーブ３と内外筒金具１，２との接
触面から水、塩水等が侵入し、それが防錆の不完全な内
外筒部分に作用して局部電池現象が起き、腐食が生じそ
れが拡大して内外筒金具１．２の接触面全体が侵され薄
肉化が生じる。その結果、ゴムスリーブ３の内外筒金具
１．２に対する接着性が損なわれゴムスリーブ３の遊離
状態を招（という実用上重大な問題が生じる。However, painting with the above-mentioned anti-rust paint cannot sufficiently prevent rust on the inner and outer cylindrical fittings 1 and 2, so when used under corrosive conditions such as water, salt water, etc., the rubber sleeve 3 Water, salt water, etc. enter from the contact surfaces with the inner and outer cylinder fittings 1 and 2, and act on the incompletely rust-proofed inner and outer cylinder parts, causing a local battery phenomenon, which causes corrosion and spreads, causing damage to the inner and outer cylinders. The entire contact surface of the metal fitting 1.2 is attacked and thinned. As a result, the adhesion of the rubber sleeve 3 to the inner and outer cylindrical fittings 1.2 is impaired, causing the rubber sleeve 3 to come loose, which is a serious problem in practice.
この発明は、このような事情に鑑みなされたもので、塩
水等がふりかかるような過酷な使用条件下においても金
具等に腐食が生じず長寿命な絞りブツシュを製造する方
法の提供をその目的とする。The present invention was made in view of the above circumstances, and its purpose is to provide a method for manufacturing a drawing bushing that has a long life and does not cause corrosion to the metal fittings even under severe usage conditions such as being sprinkled with salt water. shall be.
上記の目的を達成するため、この発明の絞りブツシュの
製法は、内筒金具および外筒金具を脱脂洗浄する脱脂洗
浄工程と、脱脂洗浄を経た内筒金具および外筒金具の周
壁面に対して研磨を施す研磨工程と、上記研磨工程を経
た内筒金具の少なくとも外周面および外筒金具の少なく
とも内周面に対してリン酸亜鉛−カルシウム化成皮膜を
形成する化成皮膜処理工程と、上記化成皮膜処理工程を
経た内筒金具の外周面および外筒金具の内周面に接着剤
を塗布する接着剤塗布工程と、上記接着剤塗布工程を経
た内筒金具を外筒金具内に配置し両金具間に未加硫ゴム
を充填し加硫してゴムスリーブ化すると同時に両金具と
接着し一体化する加硫処理工程と、上記加硫処理工程を
経たものに対し内筒金具の拡径および外筒金具の縮径の
少なくとも一方を施し上記ゴムスリーブを軸直角方向に
圧縮する絞り・拡径工程を備えているという構成をとる
。In order to achieve the above object, the manufacturing method of the drawn bushing of the present invention includes a degreasing process of degreasing and cleaning the inner and outer cylindrical metal fittings, and cleaning the peripheral wall surfaces of the inner and outer cylindrical metal fittings after the degreasing and cleaning. a polishing step of polishing; a chemical conversion coating treatment step of forming a zinc phosphate-calcium chemical conversion film on at least the outer circumferential surface of the inner cylindrical fitting and at least the inner circumferential surface of the outer cylindrical fitting which have undergone the polishing step; and the above-mentioned chemical conversion coating. An adhesive application process of applying an adhesive to the outer circumferential surface of the inner cylindrical metal fitting that has undergone the treatment process and the inner circumferential surface of the outer cylindrical metal fitting, and the inner cylindrical metal fitting that has gone through the adhesive application process described above is placed inside the outer cylindrical metal fitting to form both metal fittings. There is a vulcanization process in which unvulcanized rubber is filled between the gaps and vulcanized to form a rubber sleeve, and at the same time it is bonded and integrated with both metal fittings.The diameter of the inner cylindrical metal fitting is expanded and the outer diameter is The structure includes a drawing/diameter expanding step in which at least one of the diameters of the cylindrical metal fitting is reduced and the rubber sleeve is compressed in a direction perpendicular to the axis.
すなわち、本発明者は、絞りブツシュの金具に対してめ
っき皮膜や化成皮膜を形成することは無駄であるという
従来の固定観念を打破し、上記金具に対し、絞り加工に
耐えうるめつき皮膜、化成皮膜を形成する目的で、各種
の方法を応用し検討した。そのなかで、リン酸亜鉛−カ
ルシウム化成皮膜が極めて緻密でかつ柔軟性に富み、こ
れを絞りブツシュの内筒もしくは外筒に施すと、拡径も
しくは縮径加工を施しても皮膜が剥離せず、優れた防錆
効果を発揮することを見いだしこの発明に到達した。That is, the present inventor broke away from the conventional fixed idea that it is wasteful to form a plating film or a chemical conversion film on the metal fittings of a drawing bush, and created a plating film or a chemical conversion film on the metal fittings that can withstand the drawing process. Various methods were applied and investigated for the purpose of forming a film. Among these, the zinc phosphate-calcium conversion film is extremely dense and highly flexible, and when applied to the inner or outer cylinder of a drawing bush, the film will not peel off even if the diameter is expanded or reduced. This invention was achieved by discovering that this material exhibits an excellent antirust effect.
すなわち、この発明に係る絞りブツシュは、内筒金具と
外筒金具との間にゴムスリーブが配設され、内筒金具の
拡径および外筒金具の縮径の少なくとも一方により、ゴ
ムスリーブが軸直角方向に圧縮されている絞りブツシュ
であって、拡径がなされた内筒金具または縮径がなされ
た外筒金具に、その少なくとも拡径部分または縮径部分
を被覆するようにリン酸亜鉛−カルシウム化成皮膜層が
形成されている。That is, in the throttle bush according to the present invention, the rubber sleeve is disposed between the inner cylinder metal fitting and the outer cylinder metal fitting, and the rubber sleeve is axially moved by at least one of expanding the diameter of the inner cylinder fitting and contracting the diameter of the outer cylinder metal fitting. Zinc phosphate is applied to an inner cylindrical metal fitting whose diameter has been expanded or an outer cylindrical metal fitting whose diameter has been reduced, which is compressed in the right angle direction, so as to cover at least the enlarged diameter portion or the reduced diameter portion thereof. A calcium conversion film layer is formed.
つぎに、この発明を実施例にもとづいて説明する。Next, the present invention will be explained based on examples.
〔実施例］
第３図はこの発明の一実施例によって得られた絞りブツ
シュを示している。図において、８は内筒金具、９は外
筒金具、１０はゴムスリーブである。内筒金具８の外周
面および外筒金具９の内周面は、それぞれグリッドブラ
スト、ショツトブラスト等の凹凸加工がなされて凹凸面
に形成されており、内筒金具８．外筒金具９全体がリン
酸亜鉛−カルシウムによる化成皮膜層で被覆されている
。[Example] FIG. 3 shows a drawing bush obtained according to an example of the present invention. In the figure, 8 is an inner cylindrical metal fitting, 9 is an outer cylindrical metal fitting, and 10 is a rubber sleeve. The outer circumferential surface of the inner cylindrical metal fitting 8 and the inner circumferential surface of the outer cylindrical metal fitting 9 are each subjected to an uneven process such as grid blasting or shot blasting to form an uneven surface. The entire outer cylindrical metal fitting 9 is coated with a chemical conversion film layer made of zinc-calcium phosphate.
そして、ゴムスリーブ１０は、外筒金具９の縮径により
、軸直角方向に圧縮されている。The rubber sleeve 10 is compressed in the direction perpendicular to the axis due to the diameter reduction of the outer cylinder fitting 9.
上記絞りブツシュは、例えばつぎのようにして製造され
る。すなわち、内筒金具８および外筒金具９に対してパ
ークレン蒸気脱脂洗浄（蒸気温度１２０’Ｃ，洗浄時間
５〜３０分）を施したのち、内筒金具８の外周面および
外筒金具９の内周面に対してグリッドブラスト処理等の
機械的研磨を施し、上記周壁面の錆や油分、特に錆を除
去する。The drawn bushing is manufactured, for example, in the following manner. That is, after performing perclean steam degreasing cleaning (steam temperature 120'C, cleaning time 5 to 30 minutes) on the inner cylindrical metal fitting 8 and the outer cylindrical metal fitting 9, the outer peripheral surface of the inner cylindrical metal fitting 8 and the outer cylindrical metal fitting 9 Mechanical polishing such as grid blasting is applied to the inner circumferential surface to remove rust and oil, particularly rust, from the circumferential wall surface.
これによって、上記周壁面が粗面化する。粗面化は表面
粗度５〜５０μ、好ましくは１０〜４０μの範囲に設定
することが好ましい。この実施例では１３μに設定して
いる。ついで、上記金具８゜９に対し、必要に応じてア
ルカリ洗浄（ケイ酸ナトリウム水溶液等）および水洗を
施したのち、化成皮膜処理を施す。すなわち、第１リン
酸亜鉛。This roughens the peripheral wall surface. The surface roughening is preferably set to a surface roughness of 5 to 50μ, preferably 10 to 40μ. In this embodiment, it is set to 13μ. Next, the metal fittings 8.9 are subjected to alkaline cleaning (sodium silicate aqueous solution, etc.) and water cleaning as required, and then subjected to a chemical conversion coating treatment. Namely, zinc monophosphate.
第１リン酸カルシウムに遊離リン酸を混合したものを主
成分とし、これに促進剤として亜硝酸ナトリウムのよう
な亜硝酸塩や塩素酸等を添加し、ｐＨを２〜３程度に調
節する。そして、液温を７０〜８０°Ｃに設定して内筒
金具８．外筒金具９を浸漬し、３〜１０分間処理する。The main component is monobasic calcium phosphate mixed with free phosphoric acid, to which a nitrite such as sodium nitrite or chloric acid is added as an accelerator, and the pH is adjusted to about 2 to 3. Then, set the liquid temperature to 70 to 80°C and set the inner cylinder metal fitting 8. The outer cylindrical metal fitting 9 is immersed and treated for 3 to 10 minutes.
このとき、化成皮膜の平均付着量は０．５〜６ｇ／ｒ［
に設定することが好ましく、最も好ましいのは１〜３ｇ
１０ｆである。このようにして形成されたリン酸亜鉛−
カルシウム皮膜は、結晶サイズが２〜５μと小さく、か
つ粒状結晶であって緻密であり、柔軟性にも冨んでいる
。この化成皮膜処理により、前記機械的研磨によって生
成した粗面上に、粗面の凹凸に沿った状態でリン酸亜鉛
−カルシウムの微細粒子が緻密に付着し、粗面の微細な
ささくれ、傷を修正し平滑化する。これにより、上記周
壁面は、粗面の凹凸に沿って形成されたリン酸亜鉛−カ
ルシウムの微粒子層により、表面が緻密な凹凸面（凹凸
の度合が粗面の凹凸よりかなり緩和されている）になる
。なお、上記化成皮膜処理は、上記の条件に限定される
ものではなく、液温５０〜９５°Ｃ９処理時間３〜３０
分の範囲内で適宜選択して行えばよい。つぎに、上記の
ように化成皮膜処理がなされた内外筒金具８，９に対し
て水洗処理を施したのち、内筒金具８の外周面および外
筒金具９の内周面に接着剤を塗布する。接着剤としては
、上記化成皮膜に対するぬれ性が良好なゴム−金属用の
一液型または二液型加硫接着剤が使用される。At this time, the average deposition amount of the chemical conversion film is 0.5 to 6 g/r[
It is preferable to set it to , most preferably 1 to 3 g.
It is 10f. Zinc phosphate thus formed -
The calcium film has a small crystal size of 2 to 5 microns, is a granular crystal, is dense, and is highly flexible. Through this chemical conversion coating treatment, fine particles of zinc-calcium phosphate are densely adhered to the rough surface generated by the mechanical polishing, along the unevenness of the rough surface, thereby eliminating minute hangnails and scratches on the rough surface. Correct and smooth. As a result, the peripheral wall surface has a dense uneven surface (the degree of unevenness is considerably less than that of the rough surface) due to the fine particle layer of zinc-calcium phosphate formed along the unevenness of the rough surface. become. Note that the above chemical conversion coating treatment is not limited to the above conditions, and the liquid temperature is 50 to 95°C, the treatment time is 3 to 30
It may be selected as appropriate within the range of minutes. Next, after washing the inner and outer cylindrical fittings 8 and 9 that have been subjected to the chemical conversion coating treatment as described above, an adhesive is applied to the outer circumferential surface of the inner cylindrical fitting 8 and the inner circumferential surface of the outer cylindrical fitting 9. do. As the adhesive, a one-component or two-component vulcanized adhesive for rubber and metal, which has good wettability to the above chemical conversion film, is used.
この場合、上記両金具の上記両用壁面には化成皮膜が形
成され粗面の凹凸が緻密な化成皮膜で被覆されて凹凸度
合が緩和されていることから、接着剤塗布に際して比較
的均一厚での塗布が可能になると同時に、上記緻密な化
成皮膜からなる面は機械研磨されたままの粗面よりも濡
れ性がよいことから接着剤の塗布性も良好になる。この
ようにして接着剤が塗布された内外筒金具８，９を加硫
成形金型内に配置し、その状態で未加硫ゴムを注入して
一体加硫接着せしめることにより、内外筒金具８，９が
二重管構造となり、かつ両金具８，９間にゴムスリーブ
１０が存在するゴムブツシュが得られる。ついで、この
ゴムブツシュに対してダイスを用い絞り加工することに
より外筒金具９を縮径させ（縮径率６％）ゴムスリーブ
１０を軸直角方向に圧縮せしめ絞りブツシュを得る。こ
の場合、上記化成皮膜は、前記のように粒状結晶であっ
て緻密であり、かつ柔軟性に富んでいるため、上記の絞
り加工のような表面積が大幅に変化するような加工によ
って歪みが生じてもそれに追従し剥離しない。In this case, a chemical conversion film is formed on the dual-purpose wall surfaces of the two metal fittings, and the unevenness of the rough surface is covered with a dense chemical conversion film, reducing the degree of unevenness. At the same time, it becomes possible to apply the adhesive, and since the surface made of the dense chemical conversion film has better wettability than the rough surface that has been mechanically polished, the adhesive can also be applied better. The inner and outer cylindrical metal fittings 8 and 9 coated with adhesive in this manner are placed in a vulcanization mold, and in that state, unvulcanized rubber is injected and the inner and outer cylindrical metal fittings 8 and 9 are integrally vulcanized and bonded. , 9 have a double tube structure, and a rubber bushing is obtained in which a rubber sleeve 10 is present between the metal fittings 8 and 9. Next, this rubber bushing is subjected to a drawing process using a die to reduce the diameter of the outer cylindrical metal fitting 9 (diameter reduction ratio: 6%) and compress the rubber sleeve 10 in the direction perpendicular to the axis to obtain a drawn bushing. In this case, since the chemical conversion film is made of granular crystals, dense, and highly flexible, distortion may occur due to processing that significantly changes the surface area, such as the drawing process described above. Even if it does, it will follow it and will not peel off.
したがって、得られる絞りブツシュは、化成皮膜によっ
て内筒金具８．外筒金具９が充分被覆され防錆された状
態にあるため、水、塩水等がふりかかるような腐食条件
下における使用においても、内外筒金具８．９の、ゴム
スリーブ１０に対する接触面が全く腐食されない。しか
もはその接触面は、凹凸面（化成皮膜は凹凸に沿って生
成しているため凹凸の度合が小さくなっている）になっ
ていて接触面積が大になっているため、ゴムスリーブ１
０に対する接着が強固に行われている。そのため、水、
塩水等がふりかかるような苛酷な使用条件下においても
、ゴムスリーブ１０の内外筒金具８．９に対する接着性
が全く損なわれず、ゴムスリーブ１０の遊離状態の発生
がほぼ完全に防止され−るようになる。Therefore, the resulting aperture bushing is coated with the chemical conversion coating on the inner cylindrical metal fitting 8. Since the outer cylindrical fitting 9 is sufficiently coated and rust-proofed, even when used under corrosive conditions such as water, salt water, etc. Not corroded. Moreover, the contact surface is an uneven surface (the chemical conversion film is formed along the unevenness, so the degree of unevenness is small) and the contact area is large, so the rubber sleeve 1
The adhesion to 0 is strong. Therefore, water,
Even under severe usage conditions such as being sprinkled with salt water, etc., the adhesion of the rubber sleeve 10 to the inner and outer cylindrical fittings 8.9 is not impaired at all, and the occurrence of the rubber sleeve 10 coming loose is almost completely prevented. become.
なお、この実施例では、外筒金具９の縮径を行っている
が、内筒金具８の拡径を施すようにしてもよい。また、
内外筒金具８，９として筒状のものを用いているが、一
端にフランジを有するものを用いてもよい。In this embodiment, the diameter of the outer cylindrical fitting 9 is reduced, but the diameter of the inner cylindrical fitting 8 may be expanded. Also,
Although cylindrical ones are used as the inner and outer cylindrical fittings 8 and 9, those having a flange at one end may also be used.
つぎに、上記のようにして得られた絞りブツシュに対し
て、内筒金具８．ゴムスリーブ１０の引抜き試験を施し
、その結果を第１表に示した。なお同表には、他の実施
例２．３．４ （外筒金具に対する縮径率のみを８％、
１０％と変えたもの、内外筒に粗面加工をしなかったも
の）ホ、比較例１〜４（実施例１〜４の化成皮膜に代え
てリン酸亜鉛化成皮膜を形成したもの）、比較例５，６
゜７（実施例１〜３の化成皮膜を形成しなかったもの）
の結果を併せて示した。Next, the inner cylindrical metal fitting 8. The rubber sleeve 10 was subjected to a pull-out test, and the results are shown in Table 1. The same table also shows other examples 2.3.4 (only the diameter reduction rate for the outer cylinder fitting was 8%,
10%, those in which the inner and outer cylinders were not roughened), Comparative Examples 1 to 4 (in which a zinc phosphate chemical conversion film was formed in place of the chemical conversion film in Examples 1 to 4), Comparison Examples 5 and 6
°7 (Those in which the chemical conversion film of Examples 1 to 3 was not formed)
The results are also shown.
（以下余白）
第１表より、実施測高は、ゴムスリーブの接着力が極め
て強く、塩水噴霧を施しても内外筒金具の接触面は腐食
されず、したがって、ゴムスリーブの接着力は殆ど低下
していないことがわかる。(Left below) From Table 1, the height measurements conducted indicate that the adhesive force of the rubber sleeve is extremely strong, and the contact surfaces of the inner and outer cylindrical metal fittings are not corroded even when salt water is sprayed.Therefore, the adhesive force of the rubber sleeve is almost reduced. I can see that you haven't.
これに対して、リン酸亜鉛化成皮膜を施した比較例では
、外筒金具に対する絞り加工時に化成皮膜の剥離現象が
生じるため、ゴムスリーブの接着性が損なわれていてゴ
ムスリーブの引き抜きに大した力を要していない。しか
も、塩水噴霧により内外筒金具の腐食が生じゴムスリー
ブの接着性がより損なわれるため、引き抜きが一層容易
となっている。また、化成皮膜を全く施さない比較例は
、ゴムスリーブの初期の接着性は優れているが、塩水噴
霧後には極端にそれが低下している。したがって、比較
測高は、ゴムスリーブの遊離現象を生じやすい。これに
対して実施測高は、ゴムスリーブの初期の接着強度が高
く、しかも塩水噴霧後もそれが殆ど低下していないこと
から、ゴムスリーブの遊離現象が殆ど生じないのである
。On the other hand, in a comparative example in which a zinc phosphate chemical coating was applied, the chemical coating peeled off during the drawing process on the outer cylindrical fitting, so the adhesion of the rubber sleeve was impaired and it was difficult to pull out the rubber sleeve. It doesn't require any force. Furthermore, the salt spray causes corrosion of the inner and outer cylindrical metal fittings, further impairing the adhesion of the rubber sleeve, making it easier to pull out. Further, in the comparative example in which no chemical conversion coating was applied, the initial adhesion of the rubber sleeve was excellent, but after salt water spraying, the adhesion was extremely reduced. Therefore, comparative height measurement is likely to cause the phenomenon of the rubber sleeve coming loose. On the other hand, in the actual height measurement, the initial adhesive strength of the rubber sleeve is high, and it hardly decreases even after salt water spraying, so the phenomenon of the rubber sleeve coming off hardly occurs.
なお、リン酸亜鉛−カルシウム化成皮膜とリン酸亜鉛化
成皮膜の強度試験の結果は、第２表のとおりであり、前
者が柔軟性に冨んでいることがわかる。The strength test results for the zinc phosphate-calcium conversion coating and the zinc phosphate conversion coating are shown in Table 2, and it can be seen that the former has more flexibility.
註二〇皮膜剥離なし、Δ剥離２０％未満、×剥離２０％
以上
なお、上記性能試験はＪＩＳ に５４００に準拠し、
皮膜形成面をマンドレルに接触させて試験片を曲成し、
試験片の折曲げ部分に対して、粘着テープによる剥離試
験を施し皮膜の剥離をみることにより行った。Note 20: No film peeling, Δ peeling less than 20%, × peeling 20%
The above performance test is based on JIS 5400,
Bending the test piece with the film forming surface in contact with the mandrel,
A peel test was performed using an adhesive tape on the bent portion of the test piece to observe peeling of the film.
［発明の効果］
以上のように、この発明は、絞りブツシュの内外筒金具
の周壁面に対して、脱脂洗浄を施し、ついで研磨して錆
び等を除去したのち、リン酸亜鉛−カルシウム化成皮膜
を形成するため、研磨加工で粗面になった内外筒金具の
周壁面において、上記化成皮膜の被覆により微細なささ
くれ、傷が修復され、かつ粗面の凹凸が緩和され比較的
滑らかな状態での凹凸になる。また、上記化成皮膜は研
磨されたままの粗面よりも緻密な面であって接着剤に対
する濡れ性に冨んでいる。したがって、化成皮膜形成後
、その化成皮膜形成面に接着剤を塗布する際に、接着剤
を均一厚みに塗布することができると同時に塗布作業性
が向上し塗り残し等が生じなくなる。その結果、後工程
の絞り・拡径工程において表面積が大幅に変化するよう
な強い力が加えられても、上記のように接着剤層が均一
厚で全体に塗布されていることと、絞り・拡径の強い力
が化成皮膜で緩衝されて接着剤層に伝達されることから
接着剤層からの剥離という事態を招かない。また、上記
化成皮膜は、それ自身が緻密で柔軟性に冨んでいるため
、上記のような絞り・拡径加工によって表面積が著しく
変化するような加工を受けても全く剥離せず内外筒金具
の周壁面を被覆し続ける。したがって、得られる絞りブ
ツシュは、海水がふりかかる等の過酷な使用条件下にお
いても内外筒金具の腐食が生じず長寿命となる。[Effects of the Invention] As described above, the present invention degreases and cleans the peripheral wall surfaces of the inner and outer cylindrical fittings of the aperture bushing, then polishes them to remove rust, etc., and then applies a zinc phosphate-calcium conversion coating. In order to form a rough surface on the peripheral wall surfaces of the inner and outer cylindrical metal fittings, which have become rough due to polishing, the coating with the above chemical conversion film repairs minute hangnails and scratches, and the unevenness of the rough surface is alleviated, leaving it in a relatively smooth state. It becomes uneven. Further, the chemical conversion coating has a finer surface than the rough surface as-polished, and has high wettability to the adhesive. Therefore, after the chemical conversion film is formed, when applying the adhesive to the surface on which the chemical conversion film is formed, the adhesive can be applied to a uniform thickness, and at the same time, the application workability is improved and no uncoated areas are left. As a result, even if a strong force is applied that significantly changes the surface area during the subsequent drawing/diameter expansion process, the adhesive layer is applied to the entire surface with a uniform thickness as described above. Since the strong force of diameter expansion is buffered by the chemical conversion coating and transmitted to the adhesive layer, peeling from the adhesive layer does not occur. In addition, the above chemical conversion coating itself is dense and flexible, so even when subjected to processing such as drawing and diameter expansion that significantly changes the surface area, it does not peel off at all and remains intact on the inner and outer cylindrical metal fittings. Continue to cover the surrounding wall surface. Therefore, the resulting aperture bushing has a long life without corrosion of the inner and outer cylindrical fittings even under severe usage conditions such as being splashed with seawater.
第１図は従来例の断面図、第２図は絞りブツシュの装着
対象の説明図、第３図はこの発明の一実施例の斜視図で
ある。
８・・・内筒金具 ９・・・外筒金具 １０・・・ゴム
スリーブ
特許出願人 東海ゴム工業株式会社
代理人 弁理士 西 藤 征 彦FIG. 1 is a sectional view of a conventional example, FIG. 2 is an explanatory view of an object to which an aperture bush is attached, and FIG. 3 is a perspective view of an embodiment of the present invention. 8...Inner cylinder metal fitting 9...Outer cylinder metal fitting 10...Rubber sleeve Patent applicant Tokai Rubber Industries Co., Ltd. Agent Patent attorney Yukihiko Nishifuji
Claims (1)
工程と、脱脂洗浄を経た内筒金具および外筒金具の周壁
面に対して研磨を施す研磨工程と、上記研磨工程を経た
内筒金具の少なくとも外周面および外筒金具の少なくと
も内周面に対してリン酸亜鉛−カルシウム化成皮膜を形
成する化成皮膜処理工程と、上記化成皮膜処理工程を経
た内筒金具の外周面および外筒金具の内周面に接着剤を
塗布する接着剤塗布工程と、上記接着剤塗布工程を経た
内筒金具を外筒金具内に配置し両金具間に未加硫ゴムを
充填し加硫してゴムスリーブ化すると同時に両金具と接
着し一体化する加硫処理工程と、上記加硫処理工程を経
たものに対し内筒金具の拡径および外筒金具の縮径の少
なくとも一方を施し上記ゴムスリーブを軸直角方向に圧
縮する絞り・拡径工程を備えていることを特徴とする絞
りブッシュの製法。(1) A degreasing and cleaning process in which the inner and outer cylinder fittings are degreased and cleaned, a polishing process in which the peripheral wall surfaces of the inner and outer cylinder metal fittings that have been degreased and cleaned are polished, and the inner cylinder that has undergone the above polishing process. A chemical conversion coating treatment step of forming a zinc phosphate-calcium chemical conversion coating on at least the outer circumferential surface of the metal fitting and at least the inner circumferential surface of the outer cylindrical fitting, and the outer circumferential surface of the inner cylindrical fitting and the outer cylindrical fitting that have undergone the above chemical conversion coating treatment step. An adhesive application process in which adhesive is applied to the inner circumferential surface of the inner cylinder, and the inner cylinder fitting that has undergone the adhesive application process is placed inside the outer cylinder fitting, unvulcanized rubber is filled between the two metal fittings, and the rubber is vulcanized. At the same time as the sleeve is made, a vulcanization process is performed to bond and integrate both metal fittings, and after the above vulcanization process, at least one of expanding the diameter of the inner cylindrical metal fitting and reducing the diameter of the outer cylindrical metal fitting is performed to form the rubber sleeve. A method for manufacturing a drawing bush characterized by having a drawing/diameter expanding process that compresses in the direction perpendicular to the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33101488A JPH01237128A (en) | 1988-12-29 | 1988-12-29 | Manufacture of drawing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33101488A JPH01237128A (en) | 1988-12-29 | 1988-12-29 | Manufacture of drawing bush |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21797090A Division JPH04131529A (en) | 1990-08-17 | 1990-08-17 | Draw bush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01237128A true JPH01237128A (en) | 1989-09-21 |
| JPH0325343B2 JPH0325343B2 (en) | 1991-04-05 |
Family
ID=18238862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33101488A Granted JPH01237128A (en) | 1988-12-29 | 1988-12-29 | Manufacture of drawing bush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01237128A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147512A (en) * | 2000-11-15 | 2002-05-22 | Bridgestone Corp | Elastic bush and method of manufacturing the same |
| JP2007285513A (en) * | 2006-03-22 | 2007-11-01 | Tokai Rubber Ind Ltd | Rubber member with metal fitting and method of fabricating the same |
-
1988
- 1988-12-29 JP JP33101488A patent/JPH01237128A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147512A (en) * | 2000-11-15 | 2002-05-22 | Bridgestone Corp | Elastic bush and method of manufacturing the same |
| JP2007285513A (en) * | 2006-03-22 | 2007-11-01 | Tokai Rubber Ind Ltd | Rubber member with metal fitting and method of fabricating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0325343B2 (en) | 1991-04-05 |
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