JPH0593209A - Production of sintered oil-retaining bearing - Google Patents
Production of sintered oil-retaining bearingInfo
- Publication number
- JPH0593209A JPH0593209A JP25105191A JP25105191A JPH0593209A JP H0593209 A JPH0593209 A JP H0593209A JP 25105191 A JP25105191 A JP 25105191A JP 25105191 A JP25105191 A JP 25105191A JP H0593209 A JPH0593209 A JP H0593209A
- Authority
- JP
- Japan
- Prior art keywords
- copper foil
- sintered
- layer
- oil
- cavity
- 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.)
- Withdrawn
Links
Landscapes
- Sliding-Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属粉末を成形した圧
粉体を焼結し、この焼結体に油含浸した焼結含油軸受の
製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sintered oil-impregnated bearing in which a green compact formed by molding a metal powder is sintered and the sintered body is impregnated with oil.
【０００２】[0002]
【従来の技術】従来、この種のものとして回転軸が挿通
される軸受孔を形成した二層式の焼結含油軸受が知られ
ている。この二層式の焼結含油軸受は、銅の焼結体から
成る内層部の外側に鉄の焼結体から成る外層部が設けら
れており、前記内層部により回転軸とのなじみをよくし
前記外層部によりコストダウンを図ることができる。前
記二層式の焼結含油軸受の製造法は、キャビティ内の内
側に銅粉末を充填すると共に、キャビティ内の外側に鉄
粉末を充填し、この後圧縮成形した圧粉体を前記キャビ
ティから抜き出し、この圧粉体を、通常 700℃〜750℃
で焼結し、次に前記焼結体に油含浸を行うことによって
製造している。2. Description of the Related Art Conventionally, as this type, a two-layer type sintered oil-impregnated bearing having a bearing hole into which a rotary shaft is inserted is known. This two-layer type sintered oil-impregnated bearing has an outer layer portion made of an iron sintered body provided on the outside of an inner layer portion made of a copper sintered body, and the inner layer portion improves compatibility with the rotating shaft. Cost can be reduced by the outer layer portion. In the method for manufacturing the two-layer type sintered oil-impregnated bearing, the inside of the cavity is filled with copper powder, the inside of the cavity is filled with iron powder, and then the compression-molded green compact is extracted from the cavity. , This green compact is usually 700 ℃ ~ 750 ℃
And then impregnated with oil.
【０００３】[0003]
【発明が解決しようとする課題】前記従来技術において
は、銅粉末による内層部と鉄粉末による外層部とを一体
に圧縮した圧粉体を通常 700℃〜 750℃の焼結温度で焼
成するために、銅粉末の焼結は良好に行われるものの、
鉄粉末を所定の温度で焼結できないために鉄粉末の焼結
が良好に行われず、従って外層部の強度が低く軸受の耐
荷加重が小さくなるという問題点がある。これは鉄粉末
による外層部のみの焼結を考慮すると焼結温度を鉄粉末
の焼結温度で焼結すればよいが、このような場合には銅
粉末が焼結時に液相状態となり、この結果焼結体を維持
できなくなることに起因する。In the above-mentioned prior art, since a green compact obtained by integrally compressing an inner layer part made of copper powder and an outer layer part made of iron powder is fired at a sintering temperature of 700 ° C. to 750 ° C. In addition, although the copper powder is sintered well,
Since the iron powder cannot be sintered at a predetermined temperature, the iron powder cannot be sintered well, so that the strength of the outer layer is low and the load bearing load of the bearing is small. Considering the sintering of only the outer layer part by the iron powder, it suffices to sinter at the sintering temperature of the iron powder, but in such a case, the copper powder becomes a liquid phase state at the time of sintering. As a result, the sintered body cannot be maintained.
【０００４】本発明は、前記問題点を解決してなじみ性
の優れた高強度の焼結含油軸受の製造法を提供すること
を目的とする。An object of the present invention is to solve the above problems and provide a method for producing a high-strength sintered oil-impregnated bearing having excellent conformability.
【０００５】[0005]
【課題を解決するための手段】本発明の焼結含油軸受の
製造法は、金型のキャビティ面に銅箔を付着させて銅箔
層を形成し、この銅箔層を有するキャビティ内に鉄粉末
を充填して圧縮し、二層の圧粉体を形成した後、この圧
粉体を焼結し銅箔層を拡散結合することにより銅のコー
テング層を焼結体の周面に形成し、この焼結体に油含浸
するように構成したものである。According to the method of manufacturing a sintered oil-impregnated bearing of the present invention, a copper foil is adhered to a cavity surface of a mold to form a copper foil layer, and an iron is placed in the cavity having the copper foil layer. After filling and compressing the powder to form a two-layer green compact, the green compact is sintered and the copper foil layer is diffusion-bonded to form a copper coating layer on the peripheral surface of the sintered body. The sintered body is configured to be impregnated with oil.
【０００６】また、本発明の焼結含油軸受の製造法は、
金型のキャビティ面に銅箔を付着させて銅箔層を形成
し、この銅箔層を有するキャビティ内に鉄粉末を充填し
て圧縮し、二層の圧粉体を形成した後、この圧粉体を 9
00℃〜1100℃で焼結し銅箔層により銅のコーテング層を
焼結体の周面に形成し、この焼結体に油含浸するように
構成したものである。The method for manufacturing a sintered oil-impregnated bearing according to the present invention is
A copper foil is attached to the cavity surface of the mold to form a copper foil layer, and iron powder is filled into the cavity having the copper foil layer and compressed to form a two-layer green compact. 9 powder
The structure is such that the copper coating layer is sintered at 00 ° C to 1100 ° C and a copper foil layer is formed on the peripheral surface of the sintered body, and the sintered body is impregnated with oil.
【０００７】[0007]
【作用】前記構成により、焼結時に鉄粉末が拡散しあい
融着し一方、銅箔は焼結時に焼結後銅のコーティング層
となる。そして焼結体に油含浸することにより、残存空
孔に潤滑油が含浸される。With the above structure, the iron powder diffuses and fuses during sintering, while the copper foil becomes a copper coating layer after sintering during sintering. The remaining pores are impregnated with the lubricating oil by impregnating the sintered body with oil.
【０００８】[0008]
【実施例】次に本発明の各工程の一実施例を示す図１乃
至図５を参照して説明する。図１は本発明の第１工程で
ある金型のキャビティ面に銅箔を付着させた状態を示
す。１はダイであり、このダイ１の中心にはコアロッド
２が、またダイ１の下部には下パンチ３が昇降可能に設
けられている。また前記ダイ１の上方には上パンチ４が
昇降可能に設けられている。そして移動可能な銅箔供給
用シュー６をキャビティ５の上部開口に臨ませて、平面
積が３×１０-5mm2〜１mm2 、厚みが０．５μ〜２μの
銅箔７Ａを、圧力３kg／cm2の圧縮空気と共に噴出して
該銅箔７Ａをキャビティ５面，すなわち、ダイ１、コア
ロッド２及び下パンチ３の上面に付着させ銅箔層７を形
成する。次に第２工程である鉄粉末を充填する状態を図
２で示すように鉄粉末充填用シュー８によりベースメタ
ルとしての鉄粉末９Ａがキャビティ５に充填される。こ
の後第３工程を図３に示すようにコアロッド２、下パン
チ３を上昇させると共に、上パンチ４を下降させて銅箔
層７、鉄粉末層９を圧縮して圧粉体10を成形する。そし
て第４工程では図４に示すように前記上パンチ４を上昇
させると共に前記下パンチ３を上昇させることによっ
て、前記圧粉体10をダイ１より取り出す。この後前記圧
粉体10をメッシュベルト（図示せず）などに載置して、
焼結雰囲気ガス中で 900℃〜1100℃で焼結する。この焼
結の際図５に示すように鉄粉末層９は空孔11を残して焼
結する。一方前記銅箔層７は、焼結後０．２μ〜１．５
μの銅のコーティング層12、12Ａ、12Ｂを形成すると共
に、その一部は前記鉄粉末層９側に拡散し合金化する。
すなわち前記銅のコーティング層12、12Ａ、12Ｂは焼結
体13の内周面、外周面及び底面に各々形成される。そし
て前記焼結体13は矯正プレスによるサイジング等を経た
後、真空浸油装置（図示せず）によって前記空孔11に油
を含浸される。EXAMPLE An example of each step of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a copper foil is attached to the cavity surface of a mold which is the first step of the present invention. Reference numeral 1 denotes a die. A core rod 2 is provided at the center of the die 1, and a lower punch 3 is provided at a lower portion of the die 1 so as to be able to move up and down. An upper punch 4 is provided above the die 1 so as to be movable up and down. Then, the movable copper foil supply shoe 6 is exposed to the upper opening of the cavity 5, and a copper foil 7A having a flat area of 3 × 10 −5 mm 2 to 1 mm 2 and a thickness of 0.5 μ to 2 μ is applied at a pressure of 3 kg. The copper foil 7A is ejected together with compressed air of / cm 2 to adhere to the surface of the cavity 5, that is, the upper surface of the die 1, the core rod 2 and the lower punch 3 to form the copper foil layer 7. Next, as shown in FIG. 2, the second step of filling the iron powder with the iron powder filling shoe 8 is to fill the cavity 5 with the iron powder 9A as the base metal. Then, in the third step, as shown in FIG. 3, the core rod 2 and the lower punch 3 are raised, and the upper punch 4 is lowered to compress the copper foil layer 7 and the iron powder layer 9 to form a green compact 10. . Then, in the fourth step, as shown in FIG. 4, the upper punch 4 is raised and the lower punch 3 is raised to take out the green compact 10 from the die 1. Then, the green compact 10 is placed on a mesh belt (not shown) or the like,
Sinter at 900 ℃ ~ 1100 ℃ in sintering atmosphere gas. At the time of this sintering, the iron powder layer 9 is sintered leaving the pores 11 as shown in FIG. On the other hand, the copper foil layer 7 has a thickness of 0.2 μ to 1.5 after sintering.
Copper coating layers 12, 12A, 12B of μ are formed, and a part of them diffuses to the iron powder layer 9 side and alloys.
That is, the copper coating layers 12, 12A and 12B are formed on the inner peripheral surface, the outer peripheral surface and the bottom surface of the sintered body 13, respectively. Then, the sintered body 13 is subjected to sizing by a straightening press and the like, and then the holes 11 are impregnated with oil by a vacuum oil immersion device (not shown).
【０００９】以上のように、前記実施例においては金型
のキャビティ５面に銅箔７Ａを付着させて銅箔層７を形
成した後に、前記キャビティ５に鉄粉末９Ａを充填し
て、鉄粉末層９を形成し、この後圧縮成形した圧粉体10
を前記キャビティ５から抜き出し、前記圧粉体10を焼結
雰囲気ガス中で 900℃〜1100℃で焼成することによっ
て、前記銅箔層７に起因した銅のコーティング層12を形
成する。さらに前記銅箔７は圧縮空気と共にキャビティ
５に噴出されることにより、キャビティ５内面に銅箔層
７を均一に形成し、この結果前記コーティング層12、12
Ａ、12Ｂを均一な厚さに形成することができる。また焼
結時に前記銅箔層７を拡散結合させて焼結含油軸受の表
面にコーティング層12を形成することによって、回転軸
とのなじみが良くなるのみならず、各種機器に焼結含油
軸受を固定した際、回転軸とコーティング層12間の摩擦
熱は熱伝導性に優れるコーティング層12Ａ、12Ｂを介し
て機器側に熱伝導できるため、熱の放散性に優れる。As described above, in the above-described embodiment, after the copper foil 7A is attached to the surface of the cavity 5 of the mold to form the copper foil layer 7, the cavity 5 is filled with the iron powder 9A to obtain the iron powder. Compact 10 formed by forming layer 9 and thereafter compression molding
Is extracted from the cavity 5, and the green compact 10 is fired at 900 ° C. to 1100 ° C. in a sintering atmosphere gas to form a copper coating layer 12 derived from the copper foil layer 7. Further, the copper foil 7 is jetted into the cavity 5 together with the compressed air to uniformly form the copper foil layer 7 on the inner surface of the cavity 5, and as a result, the coating layers 12 and 12 are formed.
A and 12B can be formed in a uniform thickness. Further, by forming the coating layer 12 on the surface of the sintered oil-impregnated bearing by diffusively bonding the copper foil layer 7 at the time of sintering, not only the compatibility with the rotary shaft is improved, but also the sintered oil-impregnated bearing is used in various devices. When fixed, the frictional heat between the rotary shaft and the coating layer 12 can be conducted to the device side through the coating layers 12A and 12B having excellent thermal conductivity, and thus the heat dissipation is excellent.
【００１０】尚、本発明は前記実施例に限定されるもの
ではなく、例えばキャビティ内に銅箔を充填した後に、
吸引装置などによって銅箔を吸い取り、残り銅箔により
前記コーティング層を形成してもよく、またコアロッド
のみに銅箔を付着させて軸受孔のみに銅のコーティング
層を形成したりするなど各種の変形が可能である。The present invention is not limited to the above-mentioned embodiment. For example, after filling the cavity with copper foil,
The copper foil may be sucked by a suction device and the remaining copper foil may form the coating layer, or the copper foil may be attached only to the core rod to form the copper coating layer only on the bearing holes. Is possible.
【００１１】[0011]
【発明の効果】本発明は、金型のキャビティ面に銅箔を
付着させて銅箔層を形成し、この銅箔層を有するキャビ
ティ内に鉄粉末を充填して圧縮し、二層の圧粉体を形成
した後、この圧粉体を焼結し銅箔層を拡散結合すること
により銅のコーテング層を焼結体の周面に形成し、この
焼結体に油含浸するように構成したことにより、銅のコ
ーティング層と回転軸のなじみが良く、さらに鉄粉末に
よる焼結部により強度の大きい焼結含油軸受を製造でき
る。Industrial Applicability According to the present invention, a copper foil is adhered to the cavity surface of a mold to form a copper foil layer, and iron powder is filled into the cavity having the copper foil layer and compressed to form two layers of pressure. After forming the powder, the green compact is sintered and the copper foil layer is diffusion-bonded to form a copper coating layer on the peripheral surface of the sintered body, and the sintered body is oil-impregnated. This makes it possible to manufacture a sintered oil-impregnated bearing having good compatibility between the copper coating layer and the rotating shaft and further having a sintered portion made of iron powder and having high strength.
【００１２】さらに本発明は、金型のキャビティ面に銅
箔を付着させて銅箔層を形成し、この銅箔層を有するキ
ャビティ内に鉄粉末を充填して圧縮し、二層の圧粉体を
形成した後、この圧粉体を 900℃〜1100℃で焼結し銅箔
層により銅のコーテング層を焼結体の周面に形成し、こ
の焼結体に油含浸するように構成したことにより、銅の
コーティング層と回転軸のなじみが良く、強度の大きい
焼結含油軸受を製造できる。Further, according to the present invention, a copper foil is adhered to a cavity surface of a mold to form a copper foil layer, and iron powder is filled into the cavity having the copper foil layer and compressed to form a two-layer compacted powder. After forming the body, the green compact is sintered at 900 ℃ ~ 1100 ℃, the copper coating layer is formed on the peripheral surface of the sintered body by the copper foil layer, and the sintered body is oil impregnated. By doing so, it is possible to manufacture a sintered oil-impregnated bearing having good compatibility between the copper coating layer and the rotating shaft and having high strength.
【図１】本発明の第１工程を示す断面図である。FIG. 1 is a sectional view showing a first step of the present invention.
【図２】本発明の第２工程を示す断面図である。FIG. 2 is a sectional view showing a second step of the present invention.
【図３】本発明の第３工程を示す断面図である。FIG. 3 is a sectional view showing a third step of the present invention.
【図４】本発明の第４工程を示す断面図である。FIG. 4 is a sectional view showing a fourth step of the present invention.
【図５】本発明の焼結体を示す一部を拡大した斜視図で
ある。FIG. 5 is a partially enlarged perspective view showing a sintered body of the present invention.
１ ダイ ２ コアロッド ５ キャビティ ７ 銅箔層 ７Ａ 銅箔 ９Ａ 鉄粉末 10 圧粉体 12，12Ａ，12Ｂ コーティング層 13 焼結体 1 die 2 core rod 5 cavity 7 copper foil layer 7A copper foil 9A iron powder 10 green compact 12, 12A, 12B coating layer 13 sintered body
Claims (2)
銅箔層を形成し、この銅箔層を有するキャビティ内に鉄
粉末を充填して圧縮し、二層の圧粉体を形成した後、こ
の圧粉体を焼結し銅箔層を拡散結合することにより銅の
コーテング層を焼結体の周面に形成し、この焼結体に油
含浸するように構成したことを特徴とする焼結含油軸受
の製造法。1. A copper foil is adhered to a cavity surface of a mold to form a copper foil layer, and iron powder is filled in the cavity having the copper foil layer and compressed to form a two-layer green compact. After that, the green compact is sintered and the copper foil layer is diffusion-bonded to form a copper coating layer on the peripheral surface of the sintered body, and the sintered body is oil-impregnated. And a method for manufacturing a sintered oil-impregnated bearing.
銅箔層を形成し、この銅箔層を有するキャビティ内に鉄
粉末を充填して圧縮し、二層の圧粉体を形成した後、こ
の圧粉体を 900℃〜1100℃で焼結し銅箔層により銅のコ
ーテング層を焼結体の周面に形成し、この焼結体に油含
浸するように構成したことを特徴とする焼結含油軸受の
製造法。2. A copper foil is adhered to the cavity surface of a mold to form a copper foil layer, and iron powder is filled in the cavity having the copper foil layer and compressed to form a two-layer green compact. After that, the green compact was sintered at 900 ° C to 1100 ° C, and a copper coating layer was formed on the peripheral surface of the sintered body with a copper foil layer, and this sintered body was configured to be impregnated with oil. A characteristic method for producing sintered oil-impregnated bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25105191A JPH0593209A (en) | 1991-09-30 | 1991-09-30 | Production of sintered oil-retaining bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25105191A JPH0593209A (en) | 1991-09-30 | 1991-09-30 | Production of sintered oil-retaining bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0593209A true JPH0593209A (en) | 1993-04-16 |
Family
ID=17216891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25105191A Withdrawn JPH0593209A (en) | 1991-09-30 | 1991-09-30 | Production of sintered oil-retaining bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0593209A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009054300A1 (en) * | 2007-10-25 | 2009-04-30 | Ntn Corporation | Dynamic pressure bearing device and method of manufacturing the same |
| WO2011115241A1 (en) | 2010-03-16 | 2011-09-22 | Oshio Kozo | Pedometer for shoe |
| JP2014512491A (en) * | 2011-02-15 | 2014-05-22 | シンテリサードス イ メタルルヒア デ ソルソナ エセ アー | Manufacturing method of sintered plain bearing |
| JP2021088766A (en) * | 2021-01-19 | 2021-06-10 | 株式会社ダイヤメット | Sintered oilless bearing and its manufacturing method |
| JP2021088765A (en) * | 2021-01-19 | 2021-06-10 | 株式会社ダイヤメット | Sintered oilless bearing and its manufacturing method |
-
1991
- 1991-09-30 JP JP25105191A patent/JPH0593209A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009054300A1 (en) * | 2007-10-25 | 2009-04-30 | Ntn Corporation | Dynamic pressure bearing device and method of manufacturing the same |
| JP2009103280A (en) * | 2007-10-25 | 2009-05-14 | Ntn Corp | Dynamic pressure bearing device and its manufacturing method |
| WO2011115241A1 (en) | 2010-03-16 | 2011-09-22 | Oshio Kozo | Pedometer for shoe |
| JP2014512491A (en) * | 2011-02-15 | 2014-05-22 | シンテリサードス イ メタルルヒア デ ソルソナ エセ アー | Manufacturing method of sintered plain bearing |
| JP2021088766A (en) * | 2021-01-19 | 2021-06-10 | 株式会社ダイヤメット | Sintered oilless bearing and its manufacturing method |
| JP2021088765A (en) * | 2021-01-19 | 2021-06-10 | 株式会社ダイヤメット | Sintered oilless bearing and its manufacturing method |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981203 |