JP5443358B2 - 可変ケース深さの粉末金属歯車及びその製造方法 - Google Patents
可変ケース深さの粉末金属歯車及びその製造方法 Download PDFInfo
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- JP5443358B2 JP5443358B2 JP2010521824A JP2010521824A JP5443358B2 JP 5443358 B2 JP5443358 B2 JP 5443358B2 JP 2010521824 A JP2010521824 A JP 2010521824A JP 2010521824 A JP2010521824 A JP 2010521824A JP 5443358 B2 JP5443358 B2 JP 5443358B2
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- 239000002184 metal Substances 0.000 title claims description 34
- 229910052751 metal Inorganic materials 0.000 title claims description 34
- 239000000843 powder Substances 0.000 title claims description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 238000009826 distribution Methods 0.000 claims description 44
- 238000005242 forging Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 238000005255 carburizing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 1
- 238000004320 controlled atmosphere Methods 0.000 claims 1
- 238000005480 shot peening Methods 0.000 claims 1
- 239000000047 product Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 208000004188 Tooth Wear Diseases 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012255 powdered metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
- B22F2003/175—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging by hot forging, below sintering temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/245—Making recesses, grooves etc on the surface by removing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Gears, Cams (AREA)
- Powder Metallurgy (AREA)
- Forging (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
12 歯
14 粉末金属
16 一定有効ケース深さ
50 第一ディファレンシャルサイドギヤ
52 歯
54 第一表面部
56 歯元
58 可変ケース深さ分布
64 先端表面部
66 ピッチ線表面部
68 歯面表面部
70 ランド表面部
84 予備成形物
85 浸炭予備成形物
86 一定炭素ケース深さ
Claims (20)
- 複数の歯に形成されている可変ケース深さ分布を備える粉末金属製歯車を得る方法が、
(A)金属粉末を、ほぼ均一な初期炭素量を有し、少なくとも一つの断面表面部に所望の可変ケース深さ分布を与える予備成形物に圧縮する工程と、
(B)所望温度で順次又は同時に、焼結と、制御された炭素雰囲気を与えて初期炭素量を増加させ、かつ、ほぼ一定の炭素ケース深さを得るべく前記制御された雰囲気に所定時間維持して予備成形物を浸炭する工程と、
(C)前記可変ケース深さ分布が前記複数の歯に対し対称的で、略密で純正形状の鍛造部を得るべく前記(B)の工程から得られた予備成形物を鍛造温度及び鍛造圧力で鍛造する工程と、
(D)前記(C)の工程から得られた鍛造部を冷却する工程と、
を備えている歯車の製造方法であって、
前記ステップ(C)において、金属の重要な流動を可変に高める一式の鍛造金型を用いて前記可変ケース深さ分布を得て、鍛造中に前記複数の鍛造部の歯を形成する
ことを特徴とする歯車の製造方法。 - 鍛造前に前記予備成形物を予備鍛造温度に予備加熱し、焼入れで前記鍛造部を冷却する
工程を更に備えていることを特徴とする請求項1記載の歯車の製造方法。 - 鍛造後及び焼入れ前に温度を安定化させるべく前記鍛造部を保圧期間保圧する工程を更
に備えていることを特徴とする請求項1記載の歯車の製造方法。 - 冷却後、前記歯車に細い溝を形成する工程を更に備えていることを特徴とする請求項1
記載の歯車の製造方法。 - 冷却後、表面削り、表面仕上げ、旋削、又は、ショットピーニングの工程を備えている
ことを特徴とする請求項1記載の歯車の製造方法。 - 前記金属粉末が、低合金鉄金属粉末であることを特徴とする請求項1記載の歯車の製
造方法。 - 請求項1記載の製造方法で製造される傘歯車において、該傘歯車が回転軸を備え、前
記傘歯車の複数の歯が、前記回転軸に対し傾斜して放射状に延在していることを特徴とす
る傘歯車。 - 前記傘歯車が、溝付きディファレンシャルサイドギヤであることを特徴とする請求項
7記載の傘歯車。 - 前記歯車が、鍛造及び冷却後で純正形状に近いものであることを特徴とする請求項1
記載の歯車の製造方法。 - 第一表面部及び歯元を各々が備える複数の歯と、前記複数の歯に形成されている可変ケ
ース深さ分布とを備えた、請求項1記載の製造方法で製造される、歯車であって、前記可変ケース深さ分布が、前記第一表面部上に改良された歯の荷重及び前記歯元内に改良された曲げ疲労を有していることを特徴とする歯車。 - 前記歯車が、回転軸を備えている傘歯車で、該傘歯車の歯が、前記回転軸に対し傾斜し
て放射状に延在していることを特徴とする請求項10記載の歯車。 - 前記傘歯車が、軸方向に溝の付いた内部分を有しているディファレンシャルサイドギヤ
であることを特徴とする請求項11記載の歯車。 - 前記歯車が、低合金の鉄金属歯車であることを特徴とする請求項10記載の歯車。
- 前記各々の歯の第一表面部が、先端表面部、ピッチ線表面部、歯面表面部、及び、歯元
ランド表面部で構成されていることを特徴とする請求項10記載の歯車。 - 前記可変ケース深さ分布が、前記先端表面部で2.4mm、前記ピッチ線表面部で
1.9mm、前記歯面表面部で0.4mm、及び、前記歯元ランド表面部で0.8m
mの有効ケース深さで表されることを特徴とする請求項14記載の歯車。 - 前記可変ケース深さ分布が、(前記歯元ランド表面部)/(前記歯面表面部)= 2
/1のケース深さ比で表されることを特徴とする請求項14記載の歯車。 - 前記可変ケース深さ分布が、(前記先端表面部)/(前記歯面表面部)= 6/1の
有効ケース深さ比で表されることを特徴とする請求項14記載の歯車。 - 請求項1に記載の製造方法で製造される、複数の歯に対し対称的な可変ケース深さ分布を備えた粉末金属部を有する、歯車。
- 前記可変ケース深さ分布が、少なくとも一つの歯元ランド表面部/歯面表面部=2/
1、先端表面部/前記歯面表面部=6/1、又は、ピッチ線表面部/前記歯面表面部=
19/4で満たされるケース深さ比で表されることを特徴とする請求項18記載の歯車。 - 各々が歯の先端表面部及び歯元表面部を有する第一表面部を備えている複数の歯と、
前記複数の歯の前記第一表面部に形成されている可変ケース深さ分布とを備えた、請求項1に記載の製造方法で製造される、粉末鍛造歯車において、
前記各第一表面部の前記可変ケース深さ分布において、前記歯の先端表面部が、前記歯
元表面部よりも深いケース深さを有し、
前記可変ケース深さ分布は、鍛造前に、鍛造後に前記歯車の前記第一表面部となる前記歯車粉末金属予備成形物の表面部を一定のケース深さに浸炭し、前記歯の先端表面部と前記歯元表面部との間の前記浸炭表面部の前記ケース深さを減少させるように前記浸炭予備成形物を鍛造することによって形成されて、前記歯の先端表面部と前記歯元表面部との間に異なる摩耗、疲労強度、及び、耐衝撃特性を与えるようになっていることを特徴とする粉末鍛造歯車。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/US2007/076170 WO2009025659A1 (en) | 2007-08-17 | 2007-08-17 | Variable case depth powder metal gear and method thereof |
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JP2010537047A JP2010537047A (ja) | 2010-12-02 |
JP5443358B2 true JP5443358B2 (ja) | 2014-03-19 |
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JP (1) | JP5443358B2 (ja) |
CN (1) | CN101827673B (ja) |
DE (1) | DE112007003622B4 (ja) |
WO (1) | WO2009025659A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8517884B2 (en) * | 2006-03-24 | 2013-08-27 | Gkn Sinter Metals, Llc | Powder forged differential gear |
DE102011075366A1 (de) * | 2011-05-05 | 2012-11-08 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Hartmetallwerkstücks |
JP6301694B2 (ja) * | 2014-03-24 | 2018-03-28 | 株式会社神戸製鋼所 | 真空浸炭用鋼材及びその製造方法 |
US9568085B2 (en) * | 2014-08-13 | 2017-02-14 | Arvinmeritor Technology, Llc | Straight bevel gear with spherical involute configuration |
CN104653748A (zh) * | 2014-11-20 | 2015-05-27 | 新誉集团有限公司 | 一种s型螺旋锥齿轮箱 |
CN112475304B (zh) * | 2020-12-09 | 2021-09-28 | 福州大学 | 一种基于放电等离子烧结的12Cr不锈钢表面强化方法 |
Family Cites Families (12)
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US3703108A (en) * | 1971-04-12 | 1972-11-21 | Thomas M Mccaw | Differential |
US4002471A (en) | 1973-09-24 | 1977-01-11 | Federal-Mogul Corporation | Method of making a through-hardened scale-free forged powdered metal article without heat treatment after forging |
US3992763A (en) | 1974-09-13 | 1976-11-23 | Federal-Mogul Corporation | Method of making powdered metal parts |
US4165243A (en) * | 1978-05-31 | 1979-08-21 | Federal-Mogul Corporation | Method of making selectively carburized forged powder metal parts |
GB2035167B (en) * | 1978-12-08 | 1982-09-29 | Federal Mogul Corp | Forging recessed members |
JPH02138554A (ja) * | 1988-11-16 | 1990-05-28 | Nissan Motor Co Ltd | 高強度歯車 |
SE0002448D0 (sv) * | 2000-06-28 | 2000-06-28 | Hoeganaes Ab | method of producig powder metal components |
CN2542818Y (zh) * | 2002-04-05 | 2003-04-02 | 江汉石油钻头股份有限公司 | 一种斜钢齿牙轮钻头 |
AU2003244116A1 (en) * | 2003-06-12 | 2005-01-04 | Koyo Thermo Systems Co., Ltd. | Method of gas carburizing |
JP2006342426A (ja) * | 2005-05-26 | 2006-12-21 | Dana Corp | 浸炭方法 |
US20060266436A1 (en) | 2005-05-26 | 2006-11-30 | Fett Gregory A | Carburizing method |
US7827692B2 (en) * | 2006-03-24 | 2010-11-09 | Gkn Sinter Metals, Inc. | Variable case depth powder metal gear and method thereof |
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2007
- 2007-08-17 DE DE112007003622.2T patent/DE112007003622B4/de active Active
- 2007-08-17 JP JP2010521824A patent/JP5443358B2/ja active Active
- 2007-08-17 WO PCT/US2007/076170 patent/WO2009025659A1/en active Application Filing
- 2007-08-17 CN CN2007801011730A patent/CN101827673B/zh active Active
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Publication number | Publication date |
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CN101827673A (zh) | 2010-09-08 |
DE112007003622B4 (de) | 2020-08-06 |
WO2009025659A1 (en) | 2009-02-26 |
JP2010537047A (ja) | 2010-12-02 |
CN101827673B (zh) | 2013-07-17 |
DE112007003622T5 (de) | 2010-06-17 |
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