【発明の詳細な説明】
この発明は表面を梨地肌状にした突通し加工性がよく、
軸受性能のよいブシュに関する。[Detailed description of the invention] This invention has a satin-textured surface and has good piercing workability.
Concerning bushings with good bearing performance.
従来、軸受やブシュ（以下総括して「ブシュ」という）
は冷間圧延鋼板等の金属板を円筒状にまず形成し、次い
で真円度を高めるためダイスにより突通し加工を行う。Conventionally, bearings and bushes (hereinafter collectively referred to as "bushes")
First, a metal plate such as a cold-rolled steel plate is formed into a cylindrical shape, and then punched with a die to improve the roundness.
しかし、金属板の表面が繊密な光沢面であるため突通し
加工性が悪く、更に潤滑油の付着が悪いので、ダイスあ
るいは捲き芯との間に焼付きや、ダイスとブシュ間で削
り合うカジリが生じ充分な突通し加工がなされず、ブシ
ュの真円度が低くなり、且つダイスの耐用寿命も短い。
また、ブシュを所望位置に圧入隊合する場合も燐付きや
カジリを生じ、また、軸受メタルとして使用する場合も
、板面が平滑面のため潤滑効果、給油効果が不良で軸受
性能が悪い。そして、チェーンの連結部のブシュあるい
はローラとして前記ブシュを使用した場合は耐摩耗性が
低く、摩耗伸びが大である等の数々の欠点があり、また
軸受表面が微細な凹凸面を形成している軸受もあるが、
該凹凸面における凸面頂部は、均一な平滑面を形成して
おらず、したがって軸受面の所期馴みが悪く、且つ不等
点接触となって軸受面積が小さくなり面圧も増大して軸
を傷付ける等の欠点があつた。この発明は上記欠点を除
去し、突通し加工性が良く、真円度が高く、中組精度が
高く、軸受性能が良く、特にチェーンの連結部やローラ
に使用した場合も耐摩耗性の高い軸受を提供することを
目的とする。However, since the surface of the metal plate is a delicate and shiny surface, it has poor penetration workability, and it also has poor lubricant adhesion, so it may seize between the die or the winding core, or scrape together between the die and the bushing. Galling occurs, and sufficient piercing cannot be achieved, resulting in poor roundness of the bushing and shortening the useful life of the die.
Furthermore, when the bushing is press-fitted into a desired position, phosphorization and galling occur, and when used as a bearing metal, the plate surface is smooth, resulting in poor lubrication and oiling effects, resulting in poor bearing performance. When the above-mentioned bushings are used as bushings or rollers in chain joints, they have a number of drawbacks, such as low wear resistance and large wear elongation, and the bearing surface has minute irregularities. There are some bearings that have
The top of the convex surface of the uneven surface does not form a uniform smooth surface, and therefore the bearing surface does not fit as expected, and contact occurs at unequal points, reducing the bearing area and increasing the surface pressure. There were drawbacks such as damaging the This invention eliminates the above-mentioned drawbacks, has good piercing workability, high roundness, high center assembly accuracy, good bearing performance, and has high wear resistance especially when used in chain connections and rollers. The purpose is to provide bearings.
以下図面によりこの発明の実施例を詳細に説明すると、
第１図に示す如く、冷間圧延鋼板１はブシュ材幅の数条
の狭幅帯鋼２にスリットされている。Embodiments of this invention will be described in detail below with reference to the drawings.
As shown in FIG. 1, a cold rolled steel plate 1 is slit into several narrow steel strips 2 having the width of a bushing material.
そして、該帯鋼２は薬剤、ショットピーニング、ショッ
トプラスト等の適宜手段により表面が微細組面の裂地肌
３とされている。次いで、該梨地肌３を有する狭幅帯鋼
２を成形機等の手段で捲き加工を施し円筒体４とする。
該円筒体４の中空部に捲き芯５を挿入し、ダイス６の突
通しによる冷間塑性加工を施し、ブシュたる円筒体４の
真円度が高められる。この時、前記狭幅帯鋼２の表面は
梨地肌である微細均一な凹凸面で凸面頂部はダイスの突
通し加工により袷間加工による均等高さの硬化平滑面と
なり、また第４図に示す如くダイス面とブシュ間に多数
の油溜り７…があるので境界摩擦となり、第５図に示す
如き従釆の圧延鋼板４ａをそのまま使用した場合と異り
、平滑面及び少ない油溜り８による乾燥摩擦とならない
ので摩擦係数が小さく、ダイスの受ける面圧も４・で、
ダイスとブシュの接触面積は小さく、潤滑効果が大であ
る。更にまた、前記理由により突通し加工性がよいので
梨地肌の微細な凸面頂部は突通しダイス加工により均等
高さを有する硬化平滑面となり、該平滑面によって軸受
面積が大となって面圧を下げ軸受性能を向上させるから
、軸受として使用する場合に組立、すなわち内リングプ
レートの孔部にブシュを圧入隊合するに際しても焼付き
又はいわゆるカジリが生じない。また、組立精度が良く
使用中の競合緩みが生ぜず、チェーンの連結部等に使用
した場合もチェーンの疲労、摩耗などの動的性能が良い
。また、軸と軸受或いはピンとブシュ間の潤滑効果並び
に給油効果が改善されるために軸と軸受、ピンとブシュ
が馴み易く、軸受性能が向上する。またチェ−ンの連結
部のブシュやローラとして使用した場合は摩耗伸びが少
なく、摩耗寿命が向上する。上述の如くこの発明は円筒
体の内外表面に、微細な凹凸たる梨地肌を設け、捲き芯
を挿入しダイスの突通し加工により梨地肌の凸面頂部を
押しつぶして平滑面を形成させたブシュとしたブシュの
塑性加工時の潤滑効果、給油効果が優れ、突通し加工性
が向上するため、ブシュの真円度が容易に得られ、突通
しダイスや捲き芯とブシュの競付、カジリが発生せず、
突通しダイスの耐用寿命を比躍的に延ばすことができ、
ダイス材として超硬合金以外の低級工具材の使用も可能
となる。また、ブシュの梨地肌面と真円度の良好さから
、ブシュを所定の孔への圧入隊合の際も暁付きや摺鞍面
の削り合いたるカジリが生ぜず、組立精度が良くなるの
で、使用中の炭合緩みの発生を防止得るし、また梨地肌
凸面頂部が硬化平滑面を形成するため、潤滑効果、給油
効果が改善されるばかりでなく、軸と軸受、ピンとブシ
ュ間等の回転部分の軸受面積が大となって面圧を下げ且
つ馴み易くなって、軸受性能が向上する。そして特にチ
ェーンの連結部のブシュとして、あるいはローラとして
使用した場合は、チェ−ンの組立精度が向上するため、
疲労及び摩耗等の動的強度が改善され、チェーンの耐摩
耗性が向上する等の頗る顕著な効果を有するものである
。なお、この発明は上記実施例に限定されるものではな
くこの発明の精神を逸脱しない範囲で種々の応用改変を
なし得るのは言うまでもなく、例えばプシュの梨地肌面
は必要に応じて外面または内面の一方の面のみに施して
もよく、またブシュの材料は鋼等の金属材料に限定され
ず合成樹脂等他の材料でもよく、またブシュは梨地肌を
有する板状体を捲いて形成する場合のみでなく、既製の
円筒に薬品等の適宜手段で表面を梨地肌状にすることに
よっても梨地肌を有するブシュを得ることができるもの
である。Then, the surface of the steel strip 2 is made into a cracked texture 3 with a fine textured surface by appropriate means such as chemical treatment, shot peening, shot plast, etc. Next, the narrow steel strip 2 having the matte surface 3 is rolled into a cylindrical body 4 using a forming machine or the like.
A winding core 5 is inserted into the hollow portion of the cylindrical body 4, and cold plastic working is performed by piercing the cylindrical body 4 with a die 6, thereby increasing the roundness of the cylindrical body 4 as a bush. At this time, the surface of the narrow strip steel 2 is a finely uniform uneven surface with a satin surface, and the top of the convex surface becomes a hardened smooth surface with a uniform height by the lining processing by piercing with a die, and as shown in FIG. 4. As shown in FIG. 5, there are many oil pockets 7 between the die surface and the bushing, resulting in boundary friction. Unlike the case where the secondary rolled steel plate 4a as shown in FIG. Since there is no friction, the coefficient of friction is small, and the surface pressure the die receives is 4.
The contact area between the die and bushing is small, and the lubrication effect is large. Furthermore, because of the above-mentioned reasons, it has good piercing workability, so the top of the minute convex surface of the matte surface becomes a hardened smooth surface with uniform height by piercing die processing, and this smooth surface increases the bearing area and reduces surface pressure. Since the performance of the lower bearing is improved, seizing or so-called galling does not occur even when the bushing is assembled by press-fitting into the hole of the inner ring plate when used as a bearing. In addition, it has good assembly accuracy and does not cause competitive loosening during use, and has good dynamic performance such as chain fatigue and wear when used in chain connections. Furthermore, since the lubrication effect and oil supply effect between the shaft and the bearing or the pin and the bushing are improved, the shaft and the bearing and the pin and the bushing become more compatible, and the bearing performance is improved. Furthermore, when used as bushings or rollers in chain connections, wear elongation is reduced and wear life is improved. As described above, the present invention provides a bushing with finely uneven satin textured surfaces on the inner and outer surfaces of a cylindrical body, inserts a winding core, and crushes the convex tops of the satin texture by punching with a die to form a smooth surface. Excellent lubrication and oiling effects during plastic processing of the bushing and improved piercing workability make it easy to obtain roundness of the bushing and prevent collision between the piercing die or winding core and the bushing, as well as galling. figure,
The service life of piercing dies can be dramatically extended,
It is also possible to use low-grade tool materials other than cemented carbide as the die material. In addition, due to the satin-finished surface and good roundness of the bushing, when the bushing is press-fitted into a predetermined hole, there will be no galling such as chamfering or scraping of the sliding saddle surfaces, improving assembly accuracy. This prevents the coal from loosening during use, and the top of the convex surface of the matte surface forms a hardened and smooth surface, which not only improves the lubrication effect and oil supply effect, but also improves the lubrication effect between the shaft and the bearing, between the pin and the bushing, etc. The bearing area of the rotating part is increased, reducing surface pressure and making it easier to fit in, improving bearing performance. Especially when used as a bushing in a chain joint or as a roller, the accuracy of chain assembly is improved.
It has remarkable effects such as improved dynamic strength against fatigue and wear, and improved wear resistance of the chain. It goes without saying that this invention is not limited to the above-mentioned embodiments, and that various modifications can be made without departing from the spirit of the invention. The material of the bushing is not limited to metal materials such as steel, but may be other materials such as synthetic resin, and the bushing may be formed by rolling up a plate-shaped body with a matte surface. In addition, a bushing having a matte texture can also be obtained by making the surface of a ready-made cylinder a matte texture by using appropriate means such as chemicals.
【図面の簡単な説明】[Brief explanation of drawings]
図面はこの発明の実施例を示すものであり、第１図は冷
間圧延鋼板を示す斜視図、第２図は梨地肌面を有する狭
幅帯鋼を円筒状に成形した斜視図、第３図は突通し加工
を示す部分断面側面図、第４図は梨地肌面を有する円筒
体の突通し加工を示す要部断面側面図である。
第５図は従来の梨地肌面を有さない円筒体の突通し加工
を示す要部断面側面図である。３・・・・・・梨地肌面
、４…・・・プシュ。
第ー図第２図
第３図
第４図
第５図The drawings show embodiments of the present invention, and FIG. 1 is a perspective view showing a cold rolled steel plate, FIG. The figure is a partial cross-sectional side view showing the piercing process, and FIG. 4 is a cross-sectional side view of the main part showing the piercing process of a cylindrical body having a satin textured surface. FIG. 5 is a cross-sectional side view of a main part showing conventional piercing processing of a cylindrical body without a matte textured surface. 3...Nashiji skin surface, 4...Push. Figure - Figure 2 Figure 3 Figure 4 Figure 5