JP2762037B2 - Manufacturing method of inner diameter intermediate hollow bearing - Google Patents
Manufacturing method of inner diameter intermediate hollow bearingInfo
- Publication number
- JP2762037B2 JP2762037B2 JP6144061A JP14406194A JP2762037B2 JP 2762037 B2 JP2762037 B2 JP 2762037B2 JP 6144061 A JP6144061 A JP 6144061A JP 14406194 A JP14406194 A JP 14406194A JP 2762037 B2 JP2762037 B2 JP 2762037B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- bearing
- inner diameter
- sizing
- outer diameter
- 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
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- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は内径中間部空洞状軸受の
製造方法に係り、内径中間部が内挿された軸材と接摺し
ない好ましい径差を確保した空洞状軸受機構を形成する
と共に軸受材の精度を高め、しかも軸受ハウジングに対
する設定を容易化することができると共に製作の容易な
内径中間部空洞状軸受の好ましい製造方法を提供しよう
とするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a hollow bearing having an intermediate inner diameter, and to provide a hollow bearing mechanism having a preferable diameter difference in which the intermediate inner diameter does not come into contact with an inserted shaft member. An object of the present invention is to provide a preferable method of manufacturing a hollow bearing having an intermediate inner diameter portion, which can improve the accuracy of a bearing material, can easily set the bearing housing, and is easy to manufacture.
【０００２】[0002]
【従来の技術】回転軸の軸受を的確化するためにはそれ
なりに長い範囲に亘って支承することが好ましいが、こ
のために図４に示すように径よりも大きい長さをもった
長大軸受１１を軸１０に対して適用すると長い軸受面積
に比例して摺動摩擦抵抗が増大し、回転駆動力の摩擦抵
抗によるロスが大である。また成程成形製作の容易な圧
粉成形焼結金属体であるとしても長大軸受は原料粉末の
金型への充填性が悪いためその製作が容易でない。2. Description of the Related Art It is preferable to support a bearing for a rotary shaft over a relatively long range in order to make the bearing of the rotary shaft accurate. For this reason, a long bearing having a length larger than a diameter as shown in FIG. When the shaft 11 is applied to the shaft 10, the sliding frictional resistance increases in proportion to the long bearing area, and the loss of the rotational driving force due to the frictional resistance is large. Even if it is a compacted sintered metal body that can be easily formed and manufactured, it is not easy to manufacture a long bearing due to poor filling of a raw material powder into a mold.
【０００３】そこで回転軸１０の一端側を図５に示すよ
うにハウジング５に用いられた複数の短小軸受１２，１
２で支承することが考えられ、このようにすると各軸受
１２は短小なものでよいことになり、製作も容易とな
る。然しこの場合においては軸受１２，１２において同
軸度を得ることが非常に困難であって適正な同軸度が得
られないものは軸受け機能において甚だしく劣ったもの
となり、また適正な同軸精度をもった設定をなすための
工数が非常に大きいこととなる。Therefore, one end of the rotating shaft 10 is connected to a plurality of short bearings 12, 1 used in the housing 5 as shown in FIG.
It is conceivable that the bearings 2 are supported. In this case, each bearing 12 can be made short and easy to manufacture. However, in this case, it is very difficult to obtain the coaxiality in the bearings 12 and 12, and if the proper coaxiality cannot be obtained, the bearing function becomes extremely inferior in the bearing function. Therefore, the man-hours required to perform the operation is very large.
【０００４】上記したような図４および図５によるもの
の不利を避けるべく図６に示すように焼結金属多孔質筒
体３０の中間部内側を穿削工具によって空洞状の穿削加
工３１して両端部に軸材１０に対する接摺部を形成する
ことが考えられ、このような穿削加工部３１により軸材
１０が回転した場合における摩擦抵抗を大幅に低減し得
る。In order to avoid the disadvantages shown in FIGS. 4 and 5 as described above, as shown in FIG. 6, the inside of the intermediate portion of the sintered metal porous cylindrical body 30 is hollow-formed by a drilling tool 31. It is conceivable to form sliding portions with the shaft member 10 at both ends, and the frictional resistance when the shaft member 10 is rotated by such a drilling portion 31 can be greatly reduced.
【０００５】また特開昭５８−８４２２２においては、
段差形状の型孔を持つ上型および下型と下型の型孔中心
を貫通するサイジングコアとを備える金型を用い、筒状
焼結体の内径面、上下両端面および外径両端部を拘束し
た状態で軸方向に圧縮してその外径中央部を膨出せし
め、それに伴う塑性流動により内径中央部を拡張させる
ことを特徴とする機械加工によらない逃げを有する焼結
含油軸受の製造法が提案されている。In Japanese Patent Application Laid-Open No. 58-84222,
Using a mold with a sizing core that penetrates the center of the upper and lower molds and the lower mold with stepped mold holes, the inner diameter surface, upper and lower end surfaces and outer diameter both end portions of the cylindrical sintered body are used. Manufacture of a sintered oil-impregnated bearing with a relief that does not rely on machining, characterized in that it is compressed axially in a constrained state to expand the central part of the outer diameter and expand the central part of the inner diameter by plastic flow accompanying it. A law has been proposed.
【０００６】更に本発明者側においても特開平２−８３
０２において、図７に示すような構成を提案している。
即ち、前者は回転軸１０に対し軸受１３の内外端部に形
成された接摺部１４，１５で接合支持するようにしたも
ので、その製造は図８（Ａ）のように上下パンチ１６，
１７を有すると共に下パンチ１７に段つきコア１８を挿
入セットしたダイ１９内に原料粉体２０を装入して圧粉
成形してからサイジング工程に移してサイジングするも
のである。Further, the inventor has also disclosed in Japanese Patent Laid-Open No. 2-83
02 proposes a configuration as shown in FIG.
That is, in the former, the rotary shaft 10 is joined and supported by sliding portions 14 and 15 formed at the inner and outer ends of the bearing 13, and is manufactured by the upper and lower punches 16 and 15 as shown in FIG.
The raw material powder 20 is charged into a die 19 having a lower punch 17 and a stepped core 18 inserted and set in the lower punch 17, followed by compacting, followed by a sizing step for sizing.
【０００７】即ち、内孔２３に段部２２の形成された圧
粉成形体２１は図８（Ｂ）のようなコア２４を有する下
パンチ２５とコア２６を有する上パンチ２７をもったサ
イジングダイ２８によってサイジング処理する。つまり
中間に段部２８ａを形成したサイジングダイ２８に圧粉
成形体２１を図８（Ｃ）のように圧入サイジングし、外
径がストレートである圧粉成形体２１の下部を前記段部
２８ａで絞り込み、上パンチ２７のコア２６に対し下端
側を縮径した同図（Ｄ）のような接摺部２９となし、上
下に回転軸１０に対する接摺部２９，２９ａをもった完
成軸受体３０を得るものである。More specifically, a compacting body 21 having a step portion 22 formed in an inner hole 23 has a sizing die having a lower punch 25 having a core 24 and an upper punch 27 having a core 26 as shown in FIG. The sizing process is carried out by 28. That is, the powder compact 21 is press-fitted and sized into the sizing die 28 having a step 28a formed in the middle as shown in FIG. As shown in FIG. 3D, the bearing portion 30 is narrowed down and has a reduced diameter at the lower end side with respect to the core 26 of the upper punch 27. The completed bearing body 30 has sliding portions 29, 29a for the rotating shaft 10 above and below. Is what you get.
【０００８】[0008]
【発明が解決しようとする課題】前記した図６のものは
軸材１０に対する接摺部が少くて摩擦抵抗を大幅に低減
し得るし、ハウジングに対する取付けについても従来一
般のものと同様であるが、その穿削加工部３１の形成に
当っては圧粉成形焼結によるものより著しく莫大な工数
を必要とし、必然的に相当に高価なものとならざるを得
ない。The structure shown in FIG. 6 has a small number of sliding portions with respect to the shaft member 10 so that the frictional resistance can be greatly reduced. The mounting to the housing is the same as that of the conventional general one. However, the formation of the pierced portion 31 requires significantly more man-hours than that obtained by powder compaction sintering, and inevitably becomes considerably expensive.
【０００９】特開昭５８−８４２２２によるものにおい
ては穿削加工することなしに目的の製品を得ることがで
き、また含油軸受として給油操作する必要はないが、軸
方向圧縮によって外径中央部に膨出部分が形成されるこ
とが基本であって、それに伴う内径中央部の拡張による
逃げは必然的に限定されたものとなる。しかも機器ハウ
ジングに設定した場合には前記した外径中央部の膨出部
分によってハウジングとの間に空隙が発生せざるを得
ず、ハウジングに対する取付けが困難で安定しない不利
がある。In Japanese Patent Application Laid-Open No. 58-84222, the desired product can be obtained without drilling, and it is not necessary to perform an oiling operation as an oil-impregnated bearing. Basically, a bulged portion is formed, and the escape due to the expansion of the central portion of the inner diameter is necessarily limited. In addition, when the housing is set to the device housing, a gap must be generated between the housing and the housing due to the bulging portion at the center of the outer diameter, and there is a disadvantage that the mounting to the housing is difficult and unstable.
【００１０】更に前記した特開平２−８３０２によるも
のは焼結軸受材の内径中間部に非接触部をもった製品と
して的確に得ることができ、回転軸の回転時における摺
動摩擦抵抗が少く、しかも同軸度を持った軸受部を形成
し得るが、軸受体３０の長さ方向における外径が異って
いるのでハウジングにセットした場合に空隙を残すこと
となり、やはりその設定状態が安定しない不利がある。
また軸の回転により発生する油圧が外径空隙部に逃げる
ため油膜厚さが薄くなり金属接触になり易い。Furthermore, the above-mentioned Japanese Patent Application Laid-Open No. Hei 2-8302 can be accurately obtained as a product having a non-contact portion in the middle of the inner diameter of the sintered bearing material, and has a small sliding friction resistance when the rotating shaft rotates. In addition, a bearing portion having coaxiality can be formed, but since the outer diameter in the length direction of the bearing body 30 is different, a gap is left when the housing is set in the housing, and the setting state is still unstable. There is.
Also, the oil pressure generated by the rotation of the shaft escapes to the outer diameter gap, so that the oil film thickness becomes thin and metal contact easily occurs.
【００１１】[0011]
【課題を解決するための手段】本発明は上記したような
従来技術によるものの不利、欠点を解消することについ
て検討を重ね、量産的且つ低コストに得ることができる
と共に含油軸受として給油を必要としない軸受けにおい
て、ハウジングとの間に空隙を実質的に残すことのない
設定を得しめて安定な取付状態を形成し、しかも軸材と
の間における充分な摩擦抵抗の低減を図り、寸法的にも
正確な軸受を得ることに成功したものであって、以下の
如くである。SUMMARY OF THE INVENTION The present invention has been studied to solve the disadvantages and disadvantages of the prior art as described above, and can be mass-produced at a low cost. In a bearing that does not have a bearing, a setting that does not substantially leave an air gap between the housing and a stable mounting state is obtained, and sufficient frictional resistance between the bearing and the bearing is reduced. It has succeeded in obtaining an accurate bearing, and is as follows.
【００１２】（１） 一端側外径および内径を上方から
の段付コア挿入条件下で圧粉成形することにより該一端
側外径および内径をそれぞれ完成時の外径および内径寸
法より適当な大径状とした中間成形体を準備し、該中間
成形体をその大径状外径部を受入れてガイド成形するダ
イに上パンチにより圧下サイジングして大径状外径部を
絞り込み、該大径状外径部を残部と同径化ストレート形
状とすると同時に大径状内径部の絞り込みにより縮径さ
れた内径部および他端側内径部をサイジングコアにより
仕上げて軸材接摺部とすることを特徴とした内径中間空
洞状軸受の製造方法。(1) The outer diameter and the inner diameter of the one end are compacted under the condition of inserting a stepped core from above so that the outer diameter and the inner diameter of the one end are respectively larger than the outer diameter and the inner diameter at the time of completion. An intermediate molded body having a diameter is prepared, and the intermediate molded body is pressed down and sized by an upper punch on a die for receiving the large-diameter outer diameter portion and guiding and forming the large-diameter outer diameter portion. The outer diameter part is made the same diameter as the remaining part and the same diameter as the straight shape, and at the same time, the inner diameter part reduced by narrowing down the large diameter inner diameter part and the inner diameter part on the other end side are finished with a sizing core to make the shaft material sliding part. A method for manufacturing a hollow bearing having an inside diameter with a characteristic feature.
【００１３】[0013]
【作用】一端側外径および内径を上方からの段付コア挿
入条件下で圧粉成形することにより該一端側外径および
内径をそれぞれ完成時の外径および内径寸法より適当な
大径状として正確な構成を有し、また密度バランスの安
定した中間成形体を得しめる。The outer diameter and the inner diameter of the one end are formed into a larger diameter suitable for the outer diameter and the inner diameter of the one end by performing compacting under the condition of inserting the stepped core from above. An intermediate molded body having an accurate structure and a stable density balance can be obtained.
【００１４】上記のようにして得られた中間成形体をそ
の大径状外径部を受入れてガイド成形するダイに上パン
チにより圧下サイジングして大径状外径部を絞り込み、
外径を同径化ストレート形状とすると同時に縮径された
大径状内径部の絞り込みにより縮径された内径部および
他端内径部をサイジングコアにより仕上げ軸材接摺部と
することにより、単一行程によって外径ストレート化と
内径側における軸材接摺部形成を共に達成する。中間成
形体において完成時外径および内径寸法より大径状とさ
れる大きさは一般的に０．２〜１．０ｍｍ程度である。The intermediate molded body obtained as described above is pressed down and sized by an upper punch on a die for receiving the large-diameter outer diameter portion and guiding and forming the same, thereby narrowing down the large-diameter outer diameter portion.
The outer diameter is made the same diameter as the straight shape, and at the same time, the inner diameter part reduced by narrowing down the large diameter inner diameter part and the other end inner diameter part which are reduced by the sizing core are used as finishing shaft contact parts by the sizing core. In one process, both the straightening of the outer diameter and the formation of the shaft contact portion on the inner diameter side are achieved. The size of the intermediate molded body that is larger than the outer diameter and the inner diameter when completed is generally about 0.2 to 1.0 mm.
【００１５】[0015]
【実施例】上記したような本発明によるものの具体的な
実施態様を添付図面に示すものについて説明すると、本
発明による軸受１は図１に示すように中間に軸材１０に
接摺することのない空洞状部２が形成され、その両端側
に軸材接摺部３，４が形成されており、軸受１の外面は
長さ方向において凹凸のないストレート面６とされて、
ハウジング５に装着設定されるものである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bearing according to an embodiment of the present invention; FIG. A hollow portion 2 is formed, and shaft contact portions 3 and 4 are formed at both ends thereof. The outer surface of the bearing 1 is a straight surface 6 having no irregularities in the length direction.
It is set to be mounted on the housing 5.
【００１６】上記した本発明軸受の製造過程を段階的に
示しているのが図２であって、上部を大径部７ａとな
し、下部にガイドコア１７ａを有する下パンチ１７を設
けたダイ７に金属粉末９を充填し、段つきコア１８を有
する上パンチ１６を図２における（Ｂ）のように圧下し
て大径部７ａにおいて段部８ａの形成された圧粉成形に
よる中間成形体８を得しめる。即ち中間成形体８には大
径内孔８ｂと小径内孔８ｃとが形成されている。FIG. 2 shows the manufacturing process of the above-described bearing of the present invention step by step. FIG. 2 shows a die 7 having a large-diameter portion 7a at an upper portion and a lower punch 17 having a guide core 17a at a lower portion. 2 and the upper punch 16 having the stepped core 18 is pressed down as shown in FIG. 2 (B) to form an intermediate molded body 8 formed by compacting with a step 8a formed in the large diameter portion 7a. Get That is, a large-diameter inner hole 8b and a small-diameter inner hole 8c are formed in the intermediate molded body 8.
【００１７】上記のようにして得られた中間成形体８は
図２の（Ｃ）のようにサイジングされるが、このサイジ
ングに関しては本発明によって外周面をストレート状と
されたものはその方向を特定することなしにサイジング
処理を実施できる。即ち前記した図７および図８に示し
た従来技術によるものでは図８の（Ｂ）（Ｃ）によるサ
イジング処理に関して圧粉成形体２１は特定の方向を採
ってセットされることが必要であり、これを誤ると目的
の図８（Ｄ）に示すような両端部をそれぞれ軸材接摺部
２９、２９ａとした製品を得ることができないのに対
し、本発明においては何れの方向を採ってサイジングし
ても適切な製品を得ることができる。The intermediate molded body 8 obtained as described above is sized as shown in FIG. 2 (C). Regarding this sizing, the one whose outer peripheral surface is straight according to the present invention is oriented in the same direction. The sizing process can be performed without specifying. That is, in the case of the prior art shown in FIGS. 7 and 8 described above, the green compact 21 needs to be set to take a specific direction with respect to the sizing process shown in FIGS. If this is not correct, it is not possible to obtain a product in which both ends are formed as the shaft contact portions 29 and 29a as shown in FIG. 8D, whereas in the present invention, the sizing is performed in any direction. Even so, an appropriate product can be obtained.
【００１８】つまり、本発明によるサイジング処理を具
体的に示しているのが図２と図３であって、図２のもの
は上記のようにして得られた中間成形体８は図２の
（Ｃ）のようにサイジングダイ７ｂにおける下パンチ１
７ｂ上に反転してセットされ、下パンチ１７ｂのガイド
コア１７ｃによって位置決めされた状態でコア１６ｃに
案内されたサイジング上パンチ１６ｂの圧下を受け、段
部８ａがダイ７ｂのガイド面７ｃに案内されてダイ７ｂ
に圧入矯正される。That is, FIGS. 2 and 3 specifically show the sizing process according to the present invention. FIG. 2 shows the intermediate molded body 8 obtained as described above. Lower punch 1 in sizing die 7b as shown in C)
The sizing upper punch 16b guided by the core 16c while being set upside down on the lower punch 7b and positioned by the guide core 17c of the lower punch 17b receives the pressure, and the step 8a is guided by the guide surface 7c of the die 7b. Die 7b
It is press-fit corrected.
【００１９】これに対し図３のものにおいては図２と同
様に図３の（Ａ）（Ｂ）で得られた圧粉成形体８が、図
３の（Ｃ）のように同図（Ｂ）で得られたものと同じ方
向、即ち上下関係を採ってセットされ、下パンチ１７ｂ
のガイドコア１７ｃによって位置決めされた状態で、図
２のものと同様にコア１６ｃに案内されたサイジング上
パンチ１６ｂの圧下を受けることにより、段部８ａがガ
イド面７ｃに案内されて絞り込まれ、図３（Ｄ）のよう
にダイ７ｂに圧入矯正される。On the other hand, in the case of FIG. 3, similarly to FIG. 2, the green compact 8 obtained in FIGS. 3A and 3B is formed as shown in FIG. ), The lower punch 17b
2, the step 8a is guided by the guide surface 7c and narrowed down by receiving the pressure of the upper sizing punch 16b guided by the core 16c in the same manner as in FIG. As shown in FIG. 3 (D), press-fitting correction is performed on the die 7b.
【００２０】即ち、前記サイジングコア１６ｃは図２の
（Ｄ）または図３の（Ｄ）に示すように下パンチ１７ｂ
のコア孔中に挿入された状態でサイジング成形を受け、
成形体８の外面はストレート状となり、このサイジング
成形後にダイ７ｂから取出された製品軸受１は図２、図
３の各（Ｅ）に示したような断面構造となる。That is, as shown in FIG. 2D or FIG. 3D, the sizing core 16c has a lower punch 17b.
Undergoing sizing molding while inserted into the core hole of
The outer surface of the molded body 8 has a straight shape, and the product bearing 1 taken out from the die 7b after the sizing molding has a cross-sectional structure as shown in each (E) of FIGS.
【００２１】つまり、空洞状部２の上下に軸材接摺部
３，４が形成され、その外面はストレート面６とされた
図１に示すような軸受１を夫々単一の圧粉成形工程とサ
イジング工程によって的確に得しめ、圧粉成形体８の外
面における大径段部８ｂが先行してサイジングされる
か、後行程でサイジングされるかの差であっても得られ
た製品の内径状態は略同じとなることは明かである。In other words, the shaft contact parts 3 and 4 are formed above and below the hollow part 2, and the outer surfaces of the bearings 1 are straight surfaces 6 as shown in FIG. And the sizing step, and the inner diameter of the obtained product is obtained regardless of whether the large-diameter stepped portion 8b on the outer surface of the green compact 8 is sized before or after sizing. It is clear that the state is almost the same.
【００２２】上記のような軸受成形体は空隙率が一般的
に１２〜２５％程度のものとして得られ、焼結および含
油処理されて製品とされるが空洞状部２において摩擦抵
抗が認められず、またそのストレートな外形からしてハ
ウジングに対する圧入設定に方向を選ぶことなく平易に
設定し得ることは明かである。The above-mentioned bearing molding is generally obtained with a porosity of about 12 to 25%, and is sintered and oil-impregnated to obtain a product. It is clear that the straight outer shape can be easily set without selecting the direction of the press-fitting setting to the housing.
【００２３】また図７（Ｄ）に示したように外径の一端
側が小径となっている従来のものはこれをハウジングに
装入した場合に、外径の大きい側はそれなりに内径が縮
径されることがないので内径が同一として仕上げられた
製品であっても外径の大きい側では絞り込まれて内径が
小となる傾向を有し、またハウジングに圧入した後の軸
受保持状態や運転時の油圧維持状態も不安定となる不利
を有していたが、これらの不利は外径が一様であること
によって何れも適切に解決される。As shown in FIG. 7 (D), the conventional one having a small outside diameter at one end has a small outside diameter when the large outside diameter is inserted into a housing. Even if the product is finished with the same inner diameter, it tends to be narrowed down on the side with the larger outer diameter and the inner diameter tends to be smaller, and the bearing holding state after press-fitting into the housing and during operation Also has the disadvantage that the state of maintaining the hydraulic pressure becomes unstable, but these disadvantages can be properly solved by the uniform outer diameter.
【００２４】[0024]
【発明の効果】以上説明したような本発明によるときは
空洞状軸受部体として摩擦抵抗の少い製品を得しめ、ま
た該軸受部体を精度高く容易に製造せしめ、機器におけ
る軸受ハウジングへの取付けを容易となし、安定した設
定関係と好ましい軸受作用を得しめる軸受を平易且つ的
確に提供するなどの効果を有しており、工業的にその効
果の大きい発明である。According to the present invention as described above, a product having a low frictional resistance is obtained as a hollow bearing portion, and the bearing portion can be manufactured easily with high precision, so that it can be easily mounted on a bearing housing in equipment. The present invention has effects such as easy and accurate provision of a bearing that facilitates mounting and achieves a stable setting relationship and a favorable bearing action, and is an industrially significant effect.
【図１】本発明による軸受の１例についての軸材支承状
態を示した部分的な断面図である。FIG. 1 is a partial cross-sectional view showing a shaft support state of an example of a bearing according to the present invention.
【図２】本発明による中間空洞状軸受を製造する１つの
過程を段階的に示した説明図である。FIG. 2 is an explanatory view showing stepwise one process of manufacturing an intermediate hollow bearing according to the present invention.
【図３】本発明による中間空洞状軸受を製造するもう１
つの過程を段階的に示した説明図である。FIG. 3 shows another example of manufacturing an intermediate hollow bearing according to the present invention.
FIG. 4 is an explanatory diagram showing two steps in a stepwise manner.
【図４】従来の軸受についての一般例の１つを示した部
分的断面図である。FIG. 4 is a partial cross-sectional view showing one general example of a conventional bearing.
【図５】同じく従来の軸受についての別の例を示した部
分的断面図である。FIG. 5 is a partial sectional view showing another example of the conventional bearing.
【図６】従来の内径穿削による中間空洞状軸受の部分的
な断面図である。FIG. 6 is a partial cross-sectional view of a conventional intermediate hollow bearing formed by internal drilling.
【図７】従来の圧粉成形焼結体による中間空洞状軸受の
１例についての使用状態部分的断面図である。FIG. 7 is a partial cross-sectional view of an example of a conventional intermediate hollow bearing made of a powder compacted sintered body in use.
【図８】図７に示した軸受についての圧粉成形製造過程
を段階的に示した説明図である。FIG. 8 is an explanatory view showing step by step the powder compaction manufacturing process for the bearing shown in FIG. 7;
１ 本発明の軸受 ２ 空洞状部 ３ 軸材接摺部 ４ 軸材接摺部 ５ ハウジング ６ ストレート面 ７ ダイ ７ａ その大径部 ８ 中間成形体 ９ 金属粉末 １０ 軸 １１ 長大軸受 １２ 短小軸受 １３ 本発明者等の提案による軸受 １４ 接摺部 １５ 接摺部 １６ 上パンチ １７ 下パンチ １８ 段つきコア １９ ダイ ２０ 原料粉体 ２１ 圧粉成形体 ２２ 直角状段部 ２３ 内孔 ２４ コア ２５ 下パンチ ２６ コア ２７ 上パンチ ２８ サイジングダイ ２８ａ その段部 ２９ 接摺部 ２９ａ 接摺部 ３０ 完成軸受体 ３１ 穿削加工部 DESCRIPTION OF SYMBOLS 1 Bearing of this invention 2 Hollow part 3 Shaft contact part 4 Shaft contact part 5 Housing 6 Straight surface 7 Die 7a Large diameter part 8 Intermediate molding 9 Metal powder 10 Shaft 11 Long and large bearing 12 Short and small bearing 13 Bearings Proposed by the Inventors and the like 14 Contacting part 15 Contacting part 16 Upper punch 17 Lower punch 18 Stepped core 19 Die 20 Raw material powder 21 Compacting body 22 Right-angled stepped part 23 Inner hole 24 Core 25 Lower punch 26 Core 27 upper punch 28 sizing die 28a its step portion 29 contact portion 29a contact portion 30 completed bearing body 31 drilling portion
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F16C 33/10 F16C 33/14 B22F 5/00──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 6 , DB name) F16C 33/10 F16C 33/14 B22F 5/00
Claims (1)
コア挿入条件下で圧粉成形することにより該一端側外径
および内径をそれぞれ完成時の外径および内径寸法より
適当な大径状とした中間成形体を準備し、該中間成形体
をその大径状外径部を受入れてガイド成形するダイに上
パンチにより圧下サイジングして大径状外径部を絞り込
み、該大径状外径部を残部と同径化ストレート形状とす
ると同時に大径状内径部の絞り込みにより縮径された内
径部および他端側内径部をサイジングコアにより仕上げ
て軸材接摺部とすることを特徴とした内径中間空洞状軸
受の製造方法。1. An outside diameter and an inside diameter of one end side are formed by compacting under conditions of inserting a stepped core from above, so that the outside diameter and the inside diameter of the one end side are respectively larger than the outside diameter and the inside diameter at the time of completion. An intermediate molded body prepared in a shape is prepared, and the intermediate molded body is pressed down and sized by an upper punch on a die for receiving the large-diameter outer diameter portion and guiding and forming the large-diameter outer diameter portion, and narrowing the large-diameter outer diameter portion. The outer diameter part has the same diameter as the remaining part. The inner diameter part and the other end side inner diameter part reduced by narrowing down the large-diameter inner diameter part are finished with a sizing core to form the shaft material sliding part. Manufacturing method of the inner diameter intermediate hollow bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144061A JP2762037B2 (en) | 1994-06-03 | 1994-06-03 | Manufacturing method of inner diameter intermediate hollow bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6144061A JP2762037B2 (en) | 1994-06-03 | 1994-06-03 | Manufacturing method of inner diameter intermediate hollow bearing |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30812397A Division JPH10122240A (en) | 1997-10-23 | 1997-10-23 | Bearing of inner diameter intermediate part with hollow shape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07332363A JPH07332363A (en) | 1995-12-22 |
| JP2762037B2 true JP2762037B2 (en) | 1998-06-04 |
Family
ID=15353403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6144061A Expired - Lifetime JP2762037B2 (en) | 1994-06-03 | 1994-06-03 | Manufacturing method of inner diameter intermediate hollow bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2762037B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10025499A1 (en) * | 2000-05-23 | 2001-11-29 | Bosch Gmbh Robert | Sintered and calibrated plain bearing bush has third longitudinal section between first and second sections and which changes smoothly from contour of cylindrical second longitudinal section into constant curve |
| US8220153B2 (en) | 2006-05-26 | 2012-07-17 | Hitachi Powdered Metals Co., Ltd. | Production method for complex bearing |
| JP2008267394A (en) * | 2007-04-16 | 2008-11-06 | Hitachi Powdered Metals Co Ltd | Method of manufacturing bearing unit |
| KR102449381B1 (en) | 2014-03-04 | 2022-10-05 | 포라이트 가부시키가이샤 | Sintered bearing |
| KR102137424B1 (en) | 2014-03-04 | 2020-07-24 | 포라이트 가부시키가이샤 | Sintered bearing |
| JP7370207B2 (en) * | 2019-02-20 | 2023-10-27 | Ntn株式会社 | Magnet holder, magnet unit |
| WO2020170859A1 (en) * | 2019-02-20 | 2020-08-27 | Ntn株式会社 | Magnet holder and magnet unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07116490B2 (en) * | 1988-10-14 | 1995-12-13 | 勇 菊池 | Manufacturing method of sintered bearing material |
| JP2934470B2 (en) * | 1990-02-19 | 1999-08-16 | エヌティエヌ株式会社 | Manufacturing method of sintered oil-impregnated bearing |
| JPH03277814A (en) * | 1990-03-26 | 1991-12-09 | Ntn Corp | Manufacture of oil impregnated sintered bearing |
-
1994
- 1994-06-03 JP JP6144061A patent/JP2762037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07332363A (en) | 1995-12-22 |
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