JP2890909B2 - Method of manufacturing a gear member of a rotary gear pump having a materially densified tooth profile - Google Patents
Method of manufacturing a gear member of a rotary gear pump having a materially densified tooth profileInfo
- Publication number
- JP2890909B2 JP2890909B2 JP3190949A JP19094991A JP2890909B2 JP 2890909 B2 JP2890909 B2 JP 2890909B2 JP 3190949 A JP3190949 A JP 3190949A JP 19094991 A JP19094991 A JP 19094991A JP 2890909 B2 JP2890909 B2 JP 2890909B2
- Authority
- JP
- Japan
- Prior art keywords
- gear member
- manufacturing
- gear pump
- rotary gear
- rotary
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Forging (AREA)
- Powder Metallurgy (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、熱間鍛造加工ままの
歯形面に、バレル研磨および／または寸法出し冷間矯正
鍛造加工を施すだけで実用に供することができる、歯形
面が材質的に緻密化した回転歯車ポンプの歯車部材の製
造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth profile surface which can be put to practical use only by subjecting a tooth profile surface as hot forged to barrel polishing and / or cold straightening forging. The present invention relates to a method for manufacturing a gear member of a compact rotary gear pump.
【０００２】[0002]
【従来の技術】一般に、回転歯車ポンプの歯車部材が、
図２に概略平面図で例示されるように、一対の被動歯車
部材１と駆動歯車部材２からなり、これらの歯車部材
が、例えば特開昭２−１６９８８１号公報に記載される
通り、急冷凝固Ａｌ−Ｓｉ系合金粉末のプレス成形体か
らなる圧粉体素材に熱間鍛造加工を施すことにより製造
されていることも知られている。2. Description of the Related Art Generally, a gear member of a rotary gear pump has
As shown in a schematic plan view in FIG. 2, the driven gear member 1 and the driven gear member 2 are formed, and these gear members are quenched and solidified as described in, for example, Japanese Patent Application Laid-Open No. 2-169881. It is also known that it is manufactured by subjecting a green compact made of a pressed compact of an Al-Si alloy powder to hot forging.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の従来方
法によって製造されたＡｌ−Ｓｉ系合金製歯車部材にお
いては、熱間鍛造時における歯形面１ａ，２ａを構成す
る表面部の材料の流れが、きわめて小さく、歯形面形成
と同時に停滞した状態となってしまうことから、歯形面
表面部の緻密化が十分に行なわれず、このため、熱間鍛
造加工時に使用された潤滑剤がこれの空孔内に残留する
ことと相まって、歯形面から深さ約１mm程度に亘る材質
的に不健全な表面部をワイヤ線による放電加工を用いて
除去しているのが現状であり、この結果寸法精度の低下
並びに高コスト化が避けられないものである。However, in the Al-Si alloy gear member manufactured by the above-mentioned conventional method, the flow of the material on the surface portions forming the tooth surfaces 1a and 2a during hot forging is limited. Since it is extremely small and becomes stagnant at the same time as the formation of the tooth profile, the surface of the tooth profile is not sufficiently densified. In combination with the fact that the material remains unremoved inside, the materially unhealthy surface portion of about 1 mm depth from the tooth profile is removed by electric discharge machining using a wire, and as a result, the dimensional accuracy Reduction and cost increase are inevitable.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、熱間鍛造加工のままの状態で、
歯形面が緻密にして健全なＡｌ−Ｓｉ系合金製歯車部材
を製造すべく研究を行なった結果、急冷凝固Ａｌ−Ｓｉ
系合金粉末のプレス成形体からなる圧粉体素材に熱間鍛
造加工を施して回転歯車ポンプの歯車部材を製造するに
際して、熱間鍛造加工時に、歯車部材の歯形面に延長し
て上下方向にフランジ状捨て肉部を突出形成するように
すると、歯形面を構成する材料に流れが生じ、最初に歯
形面を形成した材料が捨て肉部に移動し、歯形面表面部
には緻密な材料が供給されるようになり、この結果空孔
も著しく少なく、したがって潤滑剤の残留もない、健全
な歯形面が形成されるようになることから、実質的にこ
のままの歯形面で実用に供することが可能になるという
研究結果を得たのである。Means for Solving the Problems Accordingly, the present inventors have
From the viewpoint as described above, in the state of hot forging,
As a result of conducting research to produce a gear member made of Al-Si based alloy having a dense and healthy tooth profile, rapidly solidified Al-Si
When hot forging is performed on a green compact made of a press-formed body of a base alloy powder to manufacture a gear member of a rotary gear pump, during hot forging, it extends to the tooth profile surface of the gear member and extends vertically. If the flange-shaped discarded portion is formed to protrude, a flow occurs in the material forming the tooth profile, the material that first formed the tooth profile moves to the discarded portion, and a dense material is formed on the tooth profile surface. Is supplied, resulting in the formation of a sound tooth profile with significantly less porosity and therefore no residual lubricant, so that it can be put to practical use with substantially the same tooth profile. The research results showed that it would be possible.
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、急冷凝固Ａｌ−Ｓｉ系合金粉末
のプレス成形体からなる圧粉体素材に熱間鍛造加工を施
して回転歯車ポンプの歯車部材を製造するに際して、上
記熱間鍛造加工時に、歯車部材の歯形面に延長して上下
方向にフランジ状捨て肉部を突出形成し、熱間鍛造後に
上記捨て肉部を除去することにより材質的に緻密化した
歯形面を有する歯車部材を製造する方法に特徴を有する
ものである。The present invention has been made on the basis of the above-mentioned research results, and a rotary gear pump is provided by subjecting a green compact made of a press-formed body of rapidly solidified Al-Si alloy powder to hot forging. When manufacturing the gear member of the above, during the hot forging process, by extending the tooth profile surface of the gear member to form a flange-shaped sacrificial portion in the vertical direction and removing the sacrificial portion after hot forging. The present invention is characterized by a method of manufacturing a gear member having a tooth profile surface that is made denser in material.
【０００６】なお、この発明の方法を実施するに際し
て、急冷凝固Ａｌ−Ｓｉ系合金粉末は、重量％で（以下
成分組成に関する％は重量％を示す）、 Ｓｉ：１２〜３０％、 ＦｅおよびＮｉのうちの１種または２種：１〜１０％、
を含有し、さらに必要に応じて、 Ｃｕ：１〜５％、 Ｍｇ：０．３〜２％、 のうちの１種または２種、を含有し、残りがＡｌと不可
避不純物からなる組成、並びに、ガスアトマイズにより
形成された−３０〜＋３５０メッシュの粒度、をもつの
が望ましい。In carrying out the method of the present invention, the rapidly solidified Al-Si alloy powder is expressed in terms of% by weight (% relating to the component composition indicates% by weight): Si: 12 to 30%, Fe and Ni One or two of: 1 to 10%,
And, if necessary, one or two of Cu: 1 to 5% and Mg: 0.3 to 2%, with the balance comprising Al and unavoidable impurities, and And a particle size of -30 to +350 mesh formed by gas atomization.
【０００７】この場合、Ｓｉ成分には、耐摩耗性を向上
させる作用があり、したがってその含有量が１２％未満
では所望のすぐれた耐摩耗性を確保することができず、
一方その含有量が３０％を越えると強度が低下するよう
になることから、その含有量を１２〜３０％とした。In this case, the Si component has an effect of improving the wear resistance. Therefore, if its content is less than 12%, the desired excellent wear resistance cannot be secured.
On the other hand, if the content exceeds 30%, the strength decreases, so the content was set to 12 to 30%.
【０００８】また、ＦｅおよびＮｉ成分には、ＡｌやＳ
ｉと金属間化合物を形成して、耐熱性、高温強度、およ
び耐摩耗性を向上させる作用があるが、その含有量が１
％未満では前記作用に所望の効果が得られず、一方その
含有量が１０％を越えると靭性が低下するようになるこ
とから、その含有量を１〜１０％とするのがよい。[0008] The Fe and Ni components include Al and S.
It forms an intermetallic compound with i to improve heat resistance, high-temperature strength, and abrasion resistance.
If the content is less than 10%, the desired effect cannot be obtained, while if the content exceeds 10%, the toughness is reduced. Therefore, the content is preferably set to 1% to 10%.
【０００９】さらに、ＣｕおよびＭｇ成分には、時効硬
化により強度を一段と向上させる作用があるので、必要
に応じて含有されるが、その含有量が、それぞれＣｕ：
１％未満およびＭｇ：０．３％未満では所望の強度向上
効果が得られず、一方その含有量が、それぞれＣｕ：５
％およびＭｇ：２％を越えると靭性が低下するようにな
ることから、その含有量は、それぞれＣｕ：１〜５％、
Ｍｇ：０．３〜２％とするのがよい。Further, since the Cu and Mg components have an effect of further improving the strength by age hardening, they are contained as necessary, and their contents are respectively Cu:
If it is less than 1% and Mg: less than 0.3%, the desired strength improving effect cannot be obtained, while the content is Cu: 5, respectively.
% And Mg: more than 2%, the toughness is reduced.
Mg: 0.3 to 2% is preferable.
【００１０】また、粉末粒度に関し、不活性ガスや空気
などを用いたガスアトマイズにより粒度を−３０〜＋３
５０メッシュにすると、アトマイズによる急冷凝固によ
って粉末中の初晶Ｓｉが１０μｍ以下の微細粒となって
素地中に均一分散するようになり、この粉末中のＳｉの
微細化によって歯車部材は高強度とすぐれた耐摩耗性を
具備するようになるのである。[0010] Further, regarding the particle size of the powder, the particle size is adjusted to -30 to +3 by gas atomization using an inert gas or air.
When the mesh size is set to 50 mesh, the primary crystal Si in the powder becomes fine particles of 10 μm or less and is uniformly dispersed in the base material by rapid solidification by atomization, and the gear member has high strength due to the fineness of the Si in the powder. It has excellent wear resistance.
【００１１】つぎに、同じく圧粉体素材の理論密度比
は、その値が６５％未満では取扱上破損が生じ易く、一
方その値が８５％を越えると、内部に存在する水分や空
気などのガス抜きが困難になることから、６５〜８５％
とするのがよい。When the theoretical density ratio of the green compact material is less than 65%, breakage is likely to occur during handling. On the other hand, when the value exceeds 85%, moisture and air existing inside the material are damaged. 65-85% because degassing becomes difficult
It is good to do.
【００１２】また、同じく熱間鍛造加工は、３００℃以
上、望ましくは粉末の再結晶温度以上で、液相生成温度
以下の範囲内の所定の温度で行なうのがよく、これによ
って緻密化が十分に進行し、９９％以上の理論密度比を
もった歯車部材の製造が可能となる。Also, the hot forging is preferably carried out at a predetermined temperature in the range of 300 ° C. or more, preferably in the range of the recrystallization temperature of the powder and in the range of the liquid phase generation temperature or less, so that the densification is sufficiently performed. And a gear member having a theoretical density ratio of 99% or more can be manufactured.
【００１３】さらに、捨て肉部除去後の歯車部材には、
バレル研磨および／または寸法出し冷間矯正鍛造が施さ
れ、かつ歯車部材の歯形面以外の上下面には寸法出しの
ための切削加工が施されて製品とされるものである。Further, the gear member after the removal of the discarded meat portion includes:
Barrel polishing and / or cold straightening forging are performed, and the upper and lower surfaces of the gear member other than the tooth profile are subjected to cutting for dimensioning to form a product.
【００１４】[0014]
【実施例】つぎに、この発明の方法を実施例により具体
的に説明する。原料粉末として、それぞれ表１に示され
る成分組成、並びに空気アトマイズによる急冷凝固によ
り粒度を−３０〜＋３５０メッシュとしたＡｌ−Ｓｉ系
合金粉末Ａ〜Ｊを用い、被動歯車部材を製造するため
に、これより２〜８ ton／cm2 の範囲内の所定の圧力で
それぞれ表２に示される理論密度比、並びに外径：８０
mm×短径（中心から山部までの径×２）：５１mm×長径
（中心から谷部までの径×２）：６８mmの平面寸法をも
った所定厚さのプレス成形体からなる圧粉体素材を形成
し、ついでこの圧粉体素材に、上下パンチの内周面先端
部に高さ：１０mm×直径方向幅：３mmの切欠きを形成し
た鍛造金型を用い、同じく表２に示される条件で熱間鍛
造加工を施して、図１に１部切欠き概略正面図で示され
るように歯形面１ａを同一面として上下方向に伸びたフ
ランジ状捨て肉部１ｂを有する歯車部材１を形成し、引
続いて前記歯車部材から前記捨て肉部１ｂを除去し、表
面をバレル研磨し、寸法出しのための冷間矯正鍛造を施
し、さらに歯形面を除く上下面および外周面を切削加工
することにより本発明法１〜１０を実施し、いずれも外
径：８０mm×短径：５０mm×長径：６７mm×厚さ：１５
mmの寸法をもった回転歯車ポンプの歯車部材の一方であ
る被動歯車部材を製造した。Next, the method of the present invention will be specifically described with reference to examples. In order to manufacture a driven gear member, using Al-Si alloy powders A to J each having a particle size of −30 to +350 mesh by rapid solidification by air atomization and a component composition shown in Table 1 as a raw material powder, From this, the theoretical density ratio shown in Table 2 at a predetermined pressure in the range of 2 to 8 ton / cm 2 , and the outer diameter: 80
mm x short diameter (diameter from center to peak) x 2: 51 mm x long diameter (diameter from center to valley x 2): green compact consisting of a press-molded body of a predetermined thickness with a plane dimension of 68 mm The material was formed, and a forging die having a notch of height: 10 mm × diameter direction width: 3 mm formed at the tip of the inner peripheral surface of the upper and lower punches was formed on the green compact. Under the conditions, hot forging is performed to form a gear member 1 having a flange-shaped discarded meat portion 1b extending in the vertical direction with the tooth profile surface 1a being the same surface as shown in a schematic front view with one notch in FIG. Subsequently, the discarded meat portion 1b is removed from the gear member, the surface is barrel-polished, cold straightening forging is performed for dimensioning, and the upper and lower surfaces and the outer peripheral surface excluding the tooth profile surface are cut. By carrying out the methods 1 to 10 of the present invention, the outer diameter was 80 mm and the shorter diameter was 50 mm. Long diameter: 67mm x thickness: 15
A driven gear member, one of the gear members of a rotary gear pump, having a dimension of mm was manufactured.
【００１５】また、捨て肉部を形成しない以外は同一の
条件で従来法１〜１０を行ない、同じく被動歯車部材を
製造した。Conventional methods 1 to 10 were carried out under the same conditions except that no discarded meat portion was formed, and a driven gear member was manufactured in the same manner.
【００１６】ついで、この結果得られた各種の被動歯車
部材について、理論密度比を測定すると共に、歯形面の
適宜個所１０ケ所の硬さ（ロックウェルＢスケール）を
測定し、この結果を、最高値、最低値、および平均値と
して表２に示した。Next, the theoretical density ratio of each of the various driven gear members obtained as a result was measured, and the hardness (Rockwell B scale) at 10 appropriate positions on the tooth profile was measured. The values, minimum values and average values are shown in Table 2.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【表３】 [Table 3]
【００２０】[0020]
【発明の効果】表２に示される結果から明らかな通り、
本発明法１〜１０で製造された被動歯車部材は、いずれ
も歯形面における硬さのバラツキがきわめて小さく、こ
のことは、緻密にして健全な歯形面が形成されているこ
とを示し、一方従来法１〜１０で製造された被動歯車部
材は、いずれも歯形面における硬さのバラツキが大き
く、これは歯形面における鍛造時の材料の流れが小さ
く、この結果歯形面表面部には多くの空孔が存在するよ
うになることを示し、製品とするためにはこの不健全な
歯形面表面部の除去を行なわなければならないことを示
すものである。As is clear from the results shown in Table 2,
Each of the driven gear members manufactured by the methods 1 to 10 of the present invention has a very small variation in hardness on the tooth profile, which indicates that a dense and sound tooth profile is formed. Each of the driven gear members manufactured by the methods 1 to 10 has a large variation in hardness on the tooth profile, which causes a small flow of material during forging on the tooth profile. This indicates that holes are to be present, and that the unhealthy tooth surface must be removed in order to obtain a product.
【００２１】上述のように、この発明の方法によれば、
熱間鍛造ままの状態で、緻密にして健全な歯形面を有す
る回転歯車ポンプの歯車部材を製造することができ、し
たがって実質的に歯形面の機械的加工を必要とすること
なく、必要に応じてバレル研磨を施す程度で、実用に供
することができるので、歯形面に高い寸法精度を確保す
ることができるほか、コスト面での有用性にも大なるも
のがあるなど工業上有用な効果がもたらされるのであ
る。As described above, according to the method of the present invention,
As hot hot forged, a gear member of a rotary gear pump having a dense and sound tooth profile can be manufactured, and thus, substantially without the need for mechanical machining of the tooth profile, as needed. It can be used practically only by barrel polishing, so that high dimensional accuracy can be ensured on the tooth profile surface, and there are also industrially useful effects such as greater cost effectiveness. It is brought.
【図１】本発明法の実施態様を示す被動歯車部材の１部
切欠き概略正面図である。FIG. 1 is a partially cutaway schematic front view of a driven gear member showing an embodiment of the method of the present invention.
【図２】回転歯車ポンプの構成部材である被動歯車部材
と駆動歯車部材を例示する概略平面図である。FIG. 2 is a schematic plan view illustrating a driven gear member and a drive gear member, which are constituent members of a rotary gear pump.
１ 被動歯車部材 １ａ 歯形面 １ｂ フランジ状捨て肉部 ２ 駆動歯車部材 ２ａ 歯形面 DESCRIPTION OF SYMBOLS 1 Driven gear member 1a Toothed surface 1b Flanged discarded portion 2 Drive gear member 2a Toothed surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂井 正昭 新潟県新潟市小金町３−１ 三菱マテリ アル株式会社 新潟製作所内 (56)参考文献 特開 平２−169881（ＪＰ，Ａ) 特開 平４−99204（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F04C 2/10 341 B21K 1/30 B22F 5/08 B23P 15/14 F04C 15/00 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masaaki Sakai 3-1 Koganecho, Niigata City, Niigata Prefecture Mitsubishi Materials Corporation Niigata Works (56) References JP-A-2-1699881 (JP, A) JP-A Heisei 4-99204 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) F04C 2/10 341 B21K 1/30 B22F 5/08 B23P 15/14 F04C 15/00
Claims (8)
成形体からなる圧粉体素材に熱間鍛造加工を施して回転
歯車ポンプの歯車部材を製造するに際して、 上記熱間鍛造加工時に、歯車部材の歯形面に延長して上
下方向にフランジ状捨て肉部を突出形成し、 熱間鍛造加工後に上記捨て肉部を除去すること、 を特徴とする材質的に緻密化した歯形面を有する回転歯
車ポンプの歯車部材の製造方法。The present invention relates to a method for manufacturing a gear member of a rotary gear pump by performing hot forging on a green compact made of a press-formed body of rapidly solidified Al—Si alloy powder. A flange-shaped waste portion is formed to protrude in the vertical direction by extending the tooth shape surface of the member, and the waste material portion is removed after hot forging, and a material-densified tooth shape surface is provided. A method for manufacturing a gear member of a gear pump.
および／または寸法出し冷間矯正鍛造を施すことを特徴
とする上記請求項１記載の回転歯車ポンプの歯車部材の
製造方法。2. The method for manufacturing a gear member for a rotary gear pump according to claim 1, wherein the gear member after the removal of the waste meat portion is subjected to barrel polishing and / or cold straightening forging.
％で、Ｓｉ：１２〜３０％、ＦｅおよびＮｉのうちの１
種または２種：１〜１０％を含有し、残りがＡｌと不可
避不純物からなる成分組成を有することを特徴とする上
記請求項１記載の回転歯車ポンプの歯車部材の製造方
法。3. The rapidly solidified Al—Si alloy powder contains, by weight%, 12 to 30% of Si and one of Fe and Ni.
2. The method for manufacturing a gear member for a rotary gear pump according to claim 1, wherein said one or two kinds are contained: 1 to 10%, and the balance has a component composition consisting of Al and inevitable impurities.
％で、Ｓｉ：１２〜３０％、ＦｅおよびＮｉのうちの１
種または２種：１〜１０％を含有し、さらにＣｕ：１〜
５％およびＭｇ：０．３〜２％のうちの１種または２種
を含有し、残りがＡｌと不可避不純物からなる成分組成
を有することを特徴とする上記請求項１記載の回転歯車
ポンプの歯車部材の製造方法。4. The rapidly solidified Al—Si alloy powder contains, by weight%, 12 to 30% of Si and one of Fe and Ni.
Species or 2 types: containing 1 to 10%, and further Cu: 1 to
2. The rotary gear pump according to claim 1, wherein the rotary gear pump contains one or two of 5% and Mg: 0.3 to 2%, and the remainder has a composition of Al and inevitable impurities. A method for manufacturing a gear member.
アトマイズにより形成され、かつ−３０〜＋３５０メッ
シュの粒度を有することを特徴とする上記請求項、１，
３、または４記載の回転歯車ポンプの歯車部材の製造方
法。5. The method according to claim 1, wherein the rapidly solidified Al—Si alloy powder is formed by gas atomization and has a particle size of −30 to +350 mesh.
5. The method for manufacturing a gear member for a rotary gear pump according to 3 or 4.
を有することを特徴とする上記請求項１記載の回転歯車
ポンプの歯車部材の製造方法。6. The method for manufacturing a gear member of a rotary gear pump according to claim 1, wherein the green compact has a theoretical density ratio of 65 to 85%.
末の再結晶温度以上で、液相生成温度以下の範囲内の所
定温度で行なわれることを特徴とする上記請求項１記載
の回転歯車ポンプの歯車部材の製造方法。7. The rotary gear according to claim 1, wherein the hot forging is performed at a predetermined temperature within a range of 300 ° C. or more or a powder recrystallization temperature or more and a liquid phase generation temperature or less. A method for manufacturing a gear member of a pump.
の理論密度比を有することを特徴とする上記請求項１記
載の回転歯車ポンプの歯車部材の製造方法。8. The method for manufacturing a gear member for a rotary gear pump according to claim 1, wherein the gear member after hot forging has a theoretical density ratio of 99% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3190949A JP2890909B2 (en) | 1991-07-05 | 1991-07-05 | Method of manufacturing a gear member of a rotary gear pump having a materially densified tooth profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3190949A JP2890909B2 (en) | 1991-07-05 | 1991-07-05 | Method of manufacturing a gear member of a rotary gear pump having a materially densified tooth profile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0518368A JPH0518368A (en) | 1993-01-26 |
| JP2890909B2 true JP2890909B2 (en) | 1999-05-17 |
Family
ID=16266360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3190949A Expired - Fee Related JP2890909B2 (en) | 1991-07-05 | 1991-07-05 | Method of manufacturing a gear member of a rotary gear pump having a materially densified tooth profile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2890909B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6089843A (en) * | 1997-10-03 | 2000-07-18 | Sumitomo Electric Industries, Ltd. | Sliding member and oil pump |
| CN102950436B (en) * | 2012-10-27 | 2016-01-27 | 富莱茵汽车部件有限公司 | A kind of gear for corrosion-resistant oil transfer pump preparation method |
| CN110653580A (en) * | 2019-11-06 | 2020-01-07 | 江阴市恒润环锻有限公司 | Method for processing offshore wind power flange |
-
1991
- 1991-07-05 JP JP3190949A patent/JP2890909B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0518368A (en) | 1993-01-26 |
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