CN114025896B - 中空弹簧及其制造方法 - Google Patents
中空弹簧及其制造方法 Download PDFInfo
- Publication number
- CN114025896B CN114025896B CN202080046670.0A CN202080046670A CN114025896B CN 114025896 B CN114025896 B CN 114025896B CN 202080046670 A CN202080046670 A CN 202080046670A CN 114025896 B CN114025896 B CN 114025896B
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- tubular member
- hollow spring
- stress
- pressing
- 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.)
- Active
Links
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/14—Torsion springs consisting of bars or tubes
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F3/00—Coiling wire into particular forms
- B21F3/02—Coiling wire into particular forms helically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
- B21F1/02—Straightening
- B21F1/026—Straightening and cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/055—Stabiliser bars
-
- 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
-
- 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
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/14—Torsion springs consisting of bars or tubes
- F16F1/145—Torsion springs consisting of bars or tubes with means for modifying the spring characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/13—Torsion spring
- B60G2202/135—Stabiliser bar and/or tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/012—Hollow or tubular elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/427—Stabiliser bars or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/70—Materials used in suspensions
- B60G2206/72—Steel
- B60G2206/724—Wires, bars or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0208—Alloys
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/024—Springs torsional
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Springs (AREA)
- Vehicle Body Suspensions (AREA)
- Heat Treatment Of Articles (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/019498 WO2021229808A1 (ja) | 2020-05-15 | 2020-05-15 | 中空ばね及びその製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114025896A CN114025896A (zh) | 2022-02-08 |
| CN114025896B true CN114025896B (zh) | 2023-08-08 |
Family
ID=78525619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080046670.0A Active CN114025896B (zh) | 2020-05-15 | 2020-05-15 | 中空弹簧及其制造方法 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US12135068B2 (https=) |
| EP (1) | EP3971442B1 (https=) |
| JP (1) | JP7266716B2 (https=) |
| KR (1) | KR102698601B1 (https=) |
| CN (1) | CN114025896B (https=) |
| CA (1) | CA3144946C (https=) |
| ES (1) | ES3035664T3 (https=) |
| MX (1) | MX2021014424A (https=) |
| PH (1) | PH12021553138A1 (https=) |
| TW (1) | TWI801851B (https=) |
| WO (1) | WO2021229808A1 (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12135068B2 (en) * | 2020-05-15 | 2024-11-05 | Mitsubishi Steel Mfg. Co., Ltd. | Hollow spring and method of manufacturing the same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007127227A (ja) * | 2005-11-04 | 2007-05-24 | Nhk Spring Co Ltd | 中空ばね |
| CN103081447A (zh) * | 2010-08-31 | 2013-05-01 | 三菱制钢株式会社 | 电子机器用滑动装置 |
| CN104094009A (zh) * | 2012-01-31 | 2014-10-08 | 三菱制钢株式会社 | 弹簧单元及滑动机构 |
| CN104619878A (zh) * | 2012-09-14 | 2015-05-13 | 日本发条株式会社 | 压缩螺旋弹簧及其制造方法 |
| CN106132577A (zh) * | 2014-03-31 | 2016-11-16 | 杰富意钢铁株式会社 | 弯曲冲压成形用模具 |
| CN106573285A (zh) * | 2014-08-28 | 2017-04-19 | 新日铁住金株式会社 | 弯曲部件的制造方法以及钢材的热弯曲加工装置 |
| JP2020038010A (ja) * | 2017-06-28 | 2020-03-12 | 三菱製鋼株式会社 | 中空ばね |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134022A (en) * | 1980-03-24 | 1981-10-20 | Hitachi Ltd | Pipe bending method |
| JPS5978720A (ja) * | 1982-10-29 | 1984-05-07 | Toshio Yoshida | 耐腐蝕性金属管の製造方法 |
| JPH0789325A (ja) | 1993-09-21 | 1995-04-04 | Mitsubishi Steel Mfg Co Ltd | 中空スタビライザ |
| JP4331300B2 (ja) * | 1999-02-15 | 2009-09-16 | 日本発條株式会社 | 中空スタビライザの製造方法 |
| JP2000234688A (ja) | 1999-02-17 | 2000-08-29 | Usui Internatl Ind Co Ltd | コモンレールの製造方法 |
| US6418770B1 (en) * | 2000-12-08 | 2002-07-16 | Meritor Suspension Systems Company | Method for improving the fatigue life of a tubular stabilizer bar |
| JP5144209B2 (ja) | 2007-10-26 | 2013-02-13 | 日本発條株式会社 | ショットピーニング用反射部材およびそれを用いたショットピーニング方法 |
| JP5066430B2 (ja) | 2007-11-20 | 2012-11-07 | 日本発條株式会社 | ショットピーニング用反射部材およびそれを用いたショットピーニング方法 |
| JP2009274077A (ja) * | 2008-05-12 | 2009-11-26 | Nippon Steel Corp | 異形断面筒状部材のプレス成形方法とその方法により成形した異形断面筒状部材 |
| JP5372548B2 (ja) | 2009-02-18 | 2013-12-18 | トピー工業株式会社 | 車両用ホイールの締結構造 |
| JP5511451B2 (ja) * | 2010-03-16 | 2014-06-04 | 中央発條株式会社 | 自動車用スタビライザの製造方法 |
| US8978432B2 (en) * | 2013-02-12 | 2015-03-17 | Caterpillar Inc. | Multi-stage tube hydroforming process |
| KR102105350B1 (ko) * | 2016-03-10 | 2020-04-29 | 닛폰세이테츠 가부시키가이샤 | 자동차용 부품의 제조 방법 및 자동차용 부품 |
| US11179763B2 (en) * | 2017-02-14 | 2021-11-23 | United States Steel Corporation | Compressive forming processes for enhancing collapse resistance in metallic tubular products |
| US12135068B2 (en) * | 2020-05-15 | 2024-11-05 | Mitsubishi Steel Mfg. Co., Ltd. | Hollow spring and method of manufacturing the same |
-
2020
- 2020-05-15 US US17/618,160 patent/US12135068B2/en active Active
- 2020-05-15 CN CN202080046670.0A patent/CN114025896B/zh active Active
- 2020-05-15 WO PCT/JP2020/019498 patent/WO2021229808A1/ja not_active Ceased
- 2020-05-15 JP JP2021570417A patent/JP7266716B2/ja active Active
- 2020-05-15 PH PH1/2021/553138A patent/PH12021553138A1/en unknown
- 2020-05-15 EP EP20935059.4A patent/EP3971442B1/en active Active
- 2020-05-15 CA CA3144946A patent/CA3144946C/en active Active
- 2020-05-15 MX MX2021014424A patent/MX2021014424A/es unknown
- 2020-05-15 KR KR1020217039265A patent/KR102698601B1/ko active Active
- 2020-05-15 ES ES20935059T patent/ES3035664T3/es active Active
-
2021
- 2021-04-26 TW TW110114926A patent/TWI801851B/zh active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007127227A (ja) * | 2005-11-04 | 2007-05-24 | Nhk Spring Co Ltd | 中空ばね |
| CN103081447A (zh) * | 2010-08-31 | 2013-05-01 | 三菱制钢株式会社 | 电子机器用滑动装置 |
| CN104094009A (zh) * | 2012-01-31 | 2014-10-08 | 三菱制钢株式会社 | 弹簧单元及滑动机构 |
| CN104619878A (zh) * | 2012-09-14 | 2015-05-13 | 日本发条株式会社 | 压缩螺旋弹簧及其制造方法 |
| CN106132577A (zh) * | 2014-03-31 | 2016-11-16 | 杰富意钢铁株式会社 | 弯曲冲压成形用模具 |
| CN106573285A (zh) * | 2014-08-28 | 2017-04-19 | 新日铁住金株式会社 | 弯曲部件的制造方法以及钢材的热弯曲加工装置 |
| JP2020038010A (ja) * | 2017-06-28 | 2020-03-12 | 三菱製鋼株式会社 | 中空ばね |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202144687A (zh) | 2021-12-01 |
| JPWO2021229808A1 (https=) | 2021-11-18 |
| WO2021229808A1 (ja) | 2021-11-18 |
| US12135068B2 (en) | 2024-11-05 |
| PH12021553138A1 (en) | 2022-07-25 |
| CN114025896A (zh) | 2022-02-08 |
| BR112021026280A2 (pt) | 2022-03-03 |
| EP3971442A4 (en) | 2022-08-03 |
| TWI801851B (zh) | 2023-05-11 |
| EP3971442B1 (en) | 2025-07-09 |
| MX2021014424A (es) | 2022-01-06 |
| ES3035664T3 (en) | 2025-09-08 |
| EP3971442A1 (en) | 2022-03-23 |
| KR20220004161A (ko) | 2022-01-11 |
| JP7266716B2 (ja) | 2023-04-28 |
| US20220170524A1 (en) | 2022-06-02 |
| CA3144946A1 (en) | 2021-11-18 |
| CA3144946C (en) | 2023-10-24 |
| KR102698601B1 (ko) | 2024-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101980804B (zh) | 异型断面筒状部件的加压成形方法和利用该加压成形方法成形的异型断面筒状部件 | |
| CN109070175B (zh) | 汽车用零件的制造方法及汽车用零件 | |
| JP7318602B2 (ja) | 試験体の作製方法、及び高張力鋼板の遅れ破壊特性評価方法 | |
| CN114025896B (zh) | 中空弹簧及其制造方法 | |
| CN113543906A (zh) | 稳定器的制造方法 | |
| CN110475626B (zh) | 一种中空稳定器、稳定器制造装置和中空稳定器的制造方法 | |
| CN101657279A (zh) | 液压成形加工品 | |
| WO2023079800A1 (ja) | 金属板の曲げ加工部の疲労き裂進展抑制方法及び自動車部品 | |
| JP7251605B1 (ja) | 金属板の曲げ加工部の疲労き裂進展抑制方法及び自動車部品 | |
| JP5779875B2 (ja) | トーションビームの製造方法 | |
| JP2006255770A (ja) | 金属板の曲げ加工装置および曲げ加工方法 | |
| RU2789651C1 (ru) | Полая пружина и способ ее изготовления | |
| JP7156340B2 (ja) | 金属板の曲げ加工方法 | |
| JPH08238526A (ja) | 曲げ部分の疲労特性の優れた小径電縫鋼管の製造方法 | |
| JP7295425B2 (ja) | トーションビームの製造方法 | |
| EP4631670A1 (en) | Method of manufacturing metal sheet structure | |
| JP4464315B2 (ja) | コンロッドの製造方法 | |
| JP6331948B2 (ja) | トーションビームの製造方法及びトーションビーム | |
| JP2026049425A (ja) | ワークの加工方法 | |
| JP2017218669A (ja) | 残留応力付与装置および残留応力付与方法 | |
| JP2006015395A (ja) | コンロッドの製造方法 | |
| JP2002316215A (ja) | 疲労特性に優れた曲げ加工品の製造方法及び曲げ加工品 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |