JP6530873B1 - 波動歯車減速機用歯車の表面処理方法 - Google Patents
波動歯車減速機用歯車の表面処理方法 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
- C23C8/66—Carburising of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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- 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
- F16H49/00—Other gearings
- F16H49/001—Wave gearings, e.g. harmonic drive transmissions
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2261/00—Machining or cutting being involved
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- F16H49/00—Other gearings
- F16H49/001—Wave gearings, e.g. harmonic drive transmissions
- F16H2049/003—Features of the flexsplines therefor
Abstract
Description
外歯歯車を観察すると,その表面には,ボブカッター等を使用して切削加工した際に生じたツールマークや,切削異常により生じた損傷等が加工痕として存在しており,これらの加工痕が破壊や亀裂の発生起点となり,外歯歯車を短寿命化させている可能性がある。
切削加工後,熱処理を行った外歯歯車の最表面の硬度測定したところ,その硬度は,JISで規定する出発材料の硬度よりも低下していることが確認された。
炭素を0.2%以上含む機械構造用鋼から成り,切削加工後,熱処理が施された波動歯車減速機用の歯車を処理対象とし,
前記処理対象の表面に,粒度♯220〜♯3000の炭化物粒体を,噴射速度50m/sec以上,又は噴射圧力0.1MPa以上で噴射して,前記切削加工の際に前記処理対象の表面に生じた加工痕を除去すると共に,前記炭化物粒体中の炭素元素を前記歯車の表面に拡散,浸透させる第1工程と,
前記第1工程後の前記処理対象の表面に,前記処理対象と同等以上の硬度を有し,かつ,粒度♯220以下の粒径である球状粒体を0.2MPa以上の噴射圧力で噴射して,前記歯車表面の内部残留圧縮応力を,−50MPa以上増大させる第2工程を行うことを特徴とする(請求項1)。
本発明の表面処理方法における処理対象は,図1及び図2を参照して説明した波動歯車減速機1の構成部材である,内歯歯車2,外歯歯車3,及び波動発生器4であり,特に,弾性変形を可能と成すために薄肉に形成されている外歯歯車3に対する表面処理に適している。
(1)第1工程
本工程(第1工程)では,前述した処理対象の表面に炭化物粒体を乾式噴射し,処理対象の製造時に行った切削加工により処理対象の表面に生じた,異常切削に伴う損傷や,方向性を持つ切削痕,研磨痕,ツールマーク等から成る加工痕を除去して表面を調整すると共に,炭化物粒体中の炭素元素を処理対象の表面に拡散,浸透させて,常温下での浸炭を行うことで,熱処理の際の脱炭で失われた炭素を表面付近に補充する。
2CO=C+CO2
本工程(第2工程)は,前述した第1工程における処理後の処理対象表面に,更に,球状粒体を乾式噴射して,処理対象の表面の内部残留圧縮応力を−50MPa以上,増大させる。
以上のように本発明の方法で波動歯車減速機用歯車の表面処理を行うことで,該表面処理を行った歯車の寿命を大幅に伸ばすことができただけでなく,波動歯車減速機の作動音を低減させることができる,消音効果についても得ることができた。
異なる材質の波動歯車減速機用の外歯歯車それぞれに対し,本発明の方法(第1工程+第2工程)で表面処理を行った場合,本発明の第2工程に対応するショットピーニングのみを行った場合,及び未処理の場合のそれぞれの表面状態の違いを確認する。
(2-1) 処理対象
処理対象として,SCM435H(含有炭素量0.32〜0.39%)製,SCM440H(含有炭素量0.37〜0.44%)製,SNCM439(含有炭素量0.36〜0.47)製の波動歯車減速機用の外歯歯車(いずれもφ60mm;熱処理品)を用意した。
粒体の噴射条件を下記の表1に示す。
各実施例(実施例1〜3)及び比較例(比較例1〜6)の材質及び処理内容を下記の表2に示す。
本発明の表面処理を行ったもの(実施例1〜3),第2工程のみを行ったもの(比較例1〜3),及び未処理のもの(比較例4〜6)それぞれの表面状態を下記の表3に示す。
2 内歯歯車(サーキュラスプライン)
3 外歯歯車(フレクスプライン)
4 波動発生器(ウェーブジェネレータ)
31 ダイヤフラム
41 ボス
RL 長径(波動発生器の)
δ 間隔
Claims (3)
- 炭素を0.2%以上含む機械構造用鋼から成り,切削加工後,熱処理が施された波動歯車減速機用の歯車を処理対象とし,
前記処理対象の表面に,粒度♯220〜♯3000の炭化物粒体を,噴射速度50m/sec以上,又は噴射圧力0.1MPa以上で噴射して,前記切削加工の際に前記処理対象の表面に生じた加工痕を除去すると共に,前記炭化物粒体中の炭素元素を前記歯車の表面に拡散,浸透させる第1工程と,
前記第1工程後の前記処理対象の表面に,前記処理対象と同等以上の硬度を有し,かつ,粒度♯220以下の粒径である球状粒体を0.2MPa以上の噴射圧力で噴射して,前記歯車表面の内部残留圧縮応力を,−50MPa以上増大させる第2工程を行うことを特徴とする波動歯車減速機用歯車の表面処理方法。 - 前記第1工程で使用する前記炭化物粒体が,SiC,又はSiC(α)である請求項1記載の波動歯車減速機用歯車の表面処理方法。
- 前記処理対象が,波動歯車減速機の外歯歯車である請求項1又は2記載の波動歯車減速機用歯車の表面処理方法。
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JP2019017074A JP6530873B1 (ja) | 2019-02-01 | 2019-02-01 | 波動歯車減速機用歯車の表面処理方法 |
EP19204151.5A EP3689544B1 (en) | 2019-02-01 | 2019-10-18 | Method of surface treatment for gear for strain wave reduction gear mechanism |
US16/662,530 US11124868B2 (en) | 2019-02-01 | 2019-10-24 | Method of surface treatment for gear for strain wave reduction gear mechanism |
CN201911218463.4A CN111002228B (zh) | 2019-02-01 | 2019-12-03 | 波动减速齿轮机构用的齿轮的表面处理方法 |
TW108145343A TWI701399B (zh) | 2019-02-01 | 2019-12-11 | 波動減速齒輪機構用的齒輪的表面處理方法 |
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JP2019017074A JP6530873B1 (ja) | 2019-02-01 | 2019-02-01 | 波動歯車減速機用歯車の表面処理方法 |
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JP2020125776A JP2020125776A (ja) | 2020-08-20 |
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EP (1) | EP3689544B1 (ja) |
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US20220234170A1 (en) * | 2021-01-26 | 2022-07-28 | Snap-On Incorporated | Tool with surfaces with a compressive surface stress layer |
CN116336163A (zh) * | 2022-09-23 | 2023-06-27 | 广东极亚精机科技有限公司 | 摆线轮及rv减速机 |
CN116214573A (zh) * | 2023-05-08 | 2023-06-06 | 广东美的制冷设备有限公司 | 机器人机械手臂结构和机器人、及挠性外齿轮的制造方法 |
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JPH10110790A (ja) | 1996-10-02 | 1998-04-28 | Harmonic Drive Syst Ind Co Ltd | 撓み噛み合い式歯車装置の可撓性外歯歯車 |
JP3242060B2 (ja) | 1998-04-23 | 2001-12-25 | 株式会社不二機販 | 常温浸炭処理方法 |
JP4307912B2 (ja) * | 2003-06-13 | 2009-08-05 | 株式会社不二機販 | 複合表面改質方法 |
JP5164539B2 (ja) | 2007-11-28 | 2013-03-21 | 大同特殊鋼株式会社 | ショットピーニング方法 |
WO2011122315A1 (ja) * | 2010-03-30 | 2011-10-06 | アイシン精機株式会社 | 波動歯車用基材の製造方法 |
US20130160899A1 (en) | 2010-09-09 | 2013-06-27 | Toyota Jidosha Kabushiki Kaisha | Gear |
CN104285075B (zh) | 2013-05-08 | 2017-07-18 | 谐波传动系统有限公司 | 挠性外齿齿轮、波动齿轮装置及挠性外齿齿轮的接合方法 |
JP6150746B2 (ja) * | 2014-02-26 | 2017-06-21 | 株式会社ハーモニック・ドライブ・システムズ | 波動歯車装置の可撓性外歯歯車および製造方法 |
CN108368919B (zh) | 2015-12-11 | 2021-02-02 | 谐波传动系统有限公司 | 扁平型波动齿轮装置 |
JP6286470B2 (ja) | 2016-04-06 | 2018-02-28 | 株式会社不二機販 | 金型の表面処理方法 |
CN106863142B (zh) | 2017-02-22 | 2019-08-09 | 河北工业大学 | 一种齿轮复合表面强化处理的方法 |
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- 2019-10-18 EP EP19204151.5A patent/EP3689544B1/en active Active
- 2019-10-24 US US16/662,530 patent/US11124868B2/en active Active
- 2019-12-03 CN CN201911218463.4A patent/CN111002228B/zh active Active
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EP3689544A1 (en) | 2020-08-05 |
TW202030428A (zh) | 2020-08-16 |
JP2020125776A (ja) | 2020-08-20 |
EP3689544B1 (en) | 2021-03-17 |
TWI701399B (zh) | 2020-08-11 |
CN111002228A (zh) | 2020-04-14 |
CN111002228B (zh) | 2021-08-24 |
US11124868B2 (en) | 2021-09-21 |
US20200248296A1 (en) | 2020-08-06 |
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