CN107206453B - 制造卡环的方法 - Google Patents

制造卡环的方法 Download PDF

Info

Publication number
CN107206453B
CN107206453B CN201580059060.3A CN201580059060A CN107206453B CN 107206453 B CN107206453 B CN 107206453B CN 201580059060 A CN201580059060 A CN 201580059060A CN 107206453 B CN107206453 B CN 107206453B
Authority
CN
China
Prior art keywords
snap ring
pin
punched
punching
deflashing
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
Application number
CN201580059060.3A
Other languages
English (en)
Other versions
CN107206453A (zh
Inventor
H.古特谢尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hugo-Benzing & Co KG GmbH
Original Assignee
Hugo-Benzing & Co KG GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hugo-Benzing & Co KG GmbH filed Critical Hugo-Benzing & Co KG GmbH
Publication of CN107206453A publication Critical patent/CN107206453A/zh
Application granted granted Critical
Publication of CN107206453B publication Critical patent/CN107206453B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/001—Shaping combined with punching, e.g. stamping and perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • B21D53/18—Making other particular articles rings, e.g. barrel hoops of hollow or C-shaped cross-section, e.g. for curtains, for eyelets
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/183—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details internal, i.e. with spreading action
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/186—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details external, i.e. with contracting action

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Punching Or Piercing (AREA)

Abstract

本发明涉及一种用于制造卡环(1)的方法，其中在平面状的板材(3)的上表面和下表面上在环形轮廓的区域内形成突出的销柱(12，13)以及在冲裁环形轮廓之后通过去飞边去除在冲裁时产生的飞边(15)，加工卡环的优点通过下述措施实现，即，通过完全裁下环形轮廓的最终冲裁从面状的板材(3)的一侧实施，在最终冲裁之前，从另一侧在这侧突出的销柱(12或13)附近部分地自由冲裁所述环形轮廓。

Description

制造卡环的方法
技术领域
本发明涉及一种用于制造卡环的方法，其中在平面状的板材的上表面和下表面上在环形轮廓的区域内形成突出的销柱以及在冲裁环形轮廓之后通过去飞边去除在冲裁时产生的飞边。
背景技术
基于这类用于制造带有在相对置的两侧上突出的销柱的卡环的方法是已知的，对此虽然没有文字的证明。通常在这类具有销柱的卡环上在冲裁边的区域中尽管做了去飞边处理仍然在卡环上存在有锋利棱的地方。
由EP1156896B1已知一种由卷制的具有两端部的金属带件制成的夹环，其中一端设有凹槽以及另一端设有可插入该凹槽的凸起。
在DE2608870C2中公开了一种用于无切削地制造卡环的压模。
CH437926A公开了一种用于制造卡环的方法。
发明内容
本发明所要解决的问题通过一种用于制造卡环的方法得以解决。在此规定，在通过完全裁下边缘轮廓的最终冲裁之前(该最终冲裁从面状的板材的一侧实施)，从另一侧在这侧突出的销柱附近部分地自由冲裁所述环形轮廓。
如同在本发明的研究中表明的那样，在环形轮廓的突出的销柱区域余留锋利棱边的飞边。通常在冲裁时、例如在冲压时在沿冲裁方向的、冲压工具从板材伸出的那一侧沿冲压轮廓产生飞边。在具有在两个相对置侧(亦即上表面和下表面上)突出的销柱的卡环中，突出的销柱周围的棱边区域对于去飞边处理而言是相当不好接近的，因此在那里特别频繁的去飞边还是不够的。例如在借助于特卢瓦尔石(Trowalsteinen)去飞边时飞边只能够不好接近地去除，因为在该区域内突出的销柱妨碍特卢瓦尔石在对棱边倒圆时的效率。但是利用所描述的措施将两个销柱附近的两个棱边区域内的冲裁刀刃(Schneidkante)分别移位到卡环的背对突出销柱的那侧，使得能够在销柱不妨碍去飞边工序(例如在特卢瓦尔抛光(Trowalisieren))的情况下非常有效地去除冲裁飞边。
在实施所述方法中的一项有利的扩展设计在于，制造具有间隙的卡环，其中在所述卡环的两个间隙侧的端部段上在卡环的两个相对置侧分别突出地造型有销柱。
优选的制造步骤在于，卡环用面状板材制成，其中所述销柱通过压制形成。
另外，为了制造有利地采取下述措施，即，所述部分自由冲裁和最终冲裁从相对置的两侧通过冲压实现。
此外所述方法的有利扩展设计在于，将所述卡环在最终冲裁之后进行淬火。
此外，一种有利的处理方式在于，所述去飞边在淬火之后进行。
另外，为了制造卡环而有利地采取下述措施，即，所述去飞边借助于特卢瓦尔石进行。以此方式可以以高的加工质量有效地对众多卡环进行去飞边。
附图说明
下面参照附图借助于实施例对本发明进行详细阐述，附图中：
图1以俯视图和在销柱区域简要表示去飞边工序的横剖示意图示出了具有在相对置的两侧突出的销柱的卡环；并且
图2以俯视图和在销柱区域的横剖示意图出了在按照本发明的方法中在制造具有在相对置的两侧突出的销柱的卡环时不同的工艺步骤。
具体实施方式
图1示出了一个带有在两个相互面对的端部段之间的间隙14的卡环1，从而所述卡环1的两个存在的腿部以相应的力克服其弹性弹力向内或向外偏转了某一圆周量，以便产生期望的应力。在间隙区域内的两个相互面对的端部段处在所述卡环1的两个相对置侧，亦即一侧在上表面10上以及另一侧在下表面11上突出地设计一个上侧销柱12和下侧销柱13，例如通过压制成形(或者例如通过在一个孔内插装一个单独的销柱来制成)。通过在所述卡环1的相对置侧布设两个销柱，能够将那些安置在所述卡环1的相对置侧上的部件，例如分齿轮沿旋转方向相对夹紧，以便将齿隙减小到最小程度。
卡环1例如用面状板材或由适合的金属(如钢)制成薄板裁制而成，尤其通过冲压。在这种情况下，在沿冲裁方向或冲压方向位于前面的一侧，在该侧冲压工具从板材伸出沿冲压轮廓或边缘轮廓产生相对锋利棱边的飞边15，如同在图1中上部所示出的横截面视图中所看到的那样。在与飞边15同侧的，在所示出的实施例中、亦即在上表面10上的突出的销柱12的区域内，飞边15用去飞边装置(例如用特卢瓦尔石2在去飞边时通过特卢瓦尔抛光)在棱边周围不是自由整齐可接触的，因此在该区域内的去飞边通常是不充分的。
因此在图2中所示的按照本发明的方法中在例如通过冲压完全冲压或最终冲裁之前，首先从金属制的面状板材3、也即金属板的另一侧在相关销柱12附近的轮廓区域内实施另一个冲裁步骤，亦即自由冲裁4。由此也在销柱12附近或其近旁区域内产生在相对置侧上的冲裁飞边，因此在随后去飞边时也要必须将在那里由于冲裁产生的飞边15去除掉。
在自由冲裁的步骤之后，卡环1从板材或金属板从相对置侧完全冲裁而成，亦即最终裁制，如图2中所示的工序a)和b)所表示的那样。自由冲裁4和最终冲裁的前后相继的步骤可以利用冲裁模具从金属板的两个相对置侧进行或者从金属板的同一侧实施，其在自由冲裁4之后使用以及引入用于最终冲裁的冲裁模具。如同在图2的横截面视图中所示的那样，飞边15位于销柱区域内在卡环1的背对所述销柱的那侧，该卡环例如由面状的板材冲制出来的。
在一种优选的制造方式中，将由金属板材冲裁制成的卡环1淬火以及然后去飞边，为此，将卡环例如借助于特卢瓦尔石2进行特卢瓦尔抛光工序。

Claims (7)

1.一种用于制造卡环(1)的方法，其中在面状板材(3)的上表面和下表面上在环形轮廓的区域内形成突出的销柱(12，13)以及在冲裁环形轮廓之后通过去飞边去除在冲裁时产生的飞边(15)，其特征在于，通过完全裁下环形轮廓的最终冲裁从面状板材(3)的一侧实施，在最终冲裁之前，从另一侧在这侧突出的销柱(12或13)附近部分地自由冲裁所述环形轮廓。
2.根据权利要求1中所述的方法，其特征在于，制造具有间隙的卡环(1)，其中在所述卡环(1)的两个间隙侧的端部段上在卡环的两个相对置侧分别突出地造型有销柱(12，13)。
3.根据权利要求1或2所述的方法，其特征在于，卡环(1)用面状板材(3)制成，其中所述销柱(12，13)通过压制形成。
4.根据权利要求1所述的方法，其特征在于，所述部分地自由冲裁和最终冲裁通过冲压实现。
5.根据权利要求1所述的方法，其特征在于，将所述卡环(1)在最终冲裁之后进行淬火。
6.根据权利要求5所述的方法，其特征在于，所述去飞边在淬火之后进行。
7.根据权利要求1所述的方法，其特征在于，所述去飞边借助于特卢瓦尔石(2)进行。
CN201580059060.3A 2014-10-29 2015-10-28 制造卡环的方法 Active CN107206453B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014115727.3 2014-10-29
DE102014115727.3A DE102014115727B3 (de) 2014-10-29 2014-10-29 Verfahren zum Herstellen eines Spannrings
PCT/EP2015/075043 WO2016066720A1 (de) 2014-10-29 2015-10-28 Verfahren zum herstellen eines spannrings

Publications (2)

Publication Number Publication Date
CN107206453A CN107206453A (zh) 2017-09-26
CN107206453B true CN107206453B (zh) 2019-03-26

Family

ID=54365237

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580059060.3A Active CN107206453B (zh) 2014-10-29 2015-10-28 制造卡环的方法

Country Status (5)

Country Link
US (1) US10835946B2 (zh)
EP (1) EP3212349B1 (zh)
CN (1) CN107206453B (zh)
DE (1) DE102014115727B3 (zh)
WO (1) WO2016066720A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201420626D0 (en) * 2014-11-20 2015-01-07 Cummins Ltd Bearing unit anti-rotation device
DE102015106066A1 (de) 2015-04-21 2016-10-27 Hugo Benzing Gmbh & Co. Kg Spannring mit einem einen Spalt aufweisenden Ringteil und Verfahren zu seiner Herstellung
DE102019103431B3 (de) * 2019-02-12 2020-04-09 Hugo Benzing Gmbh & Co. Kg Druckentlastungsventil zum Abbau von in einem zellenartigen Hohlraum, wie einer Batteriezelle, entstehendem Druck
CN112207193B (zh) * 2020-10-20 2022-05-31 东风汽车有限公司 一种锥形挡圈连续加工成形模具
CN116765276B (zh) * 2023-08-24 2023-11-28 苏州铭峰精密机械有限公司 一种高精度c形工件挤压成型方法和成型连续模

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184242A (en) * 1978-03-02 1980-01-22 Petrie John A Beveled retaining ring and method for constructing the same
US4621515A (en) * 1982-03-12 1986-11-11 George Salter & Co. Ltd. Method and apparatus for making circlips
CN102056688A (zh) * 2008-06-06 2011-05-11 盖茨公司 制造环的方法
CN102554080A (zh) * 2011-12-22 2012-07-11 浙江鑫永利卡环有限公司 卡环绕制成型的方法和制造设备
CN103008495A (zh) * 2012-12-24 2013-04-03 江麓机电集团有限公司 一种弹性挡圈加工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH437926A (de) * 1964-11-24 1967-06-15 Oetiker Hans Verfahren zur Herstellung eines Spannringes oder Spanngliedes
US3962899A (en) * 1975-03-26 1976-06-15 Textron, Inc. Method and apparatus for making an eccentric locking collar
FR2790214B1 (fr) * 1999-02-26 2001-05-18 Caillau Ets Bague a retreindre et son procede de fabrication
US6843612B2 (en) * 2001-09-26 2005-01-18 Spx Corporation Retaining ring apparatus and method
US7389579B2 (en) * 2006-02-15 2008-06-24 Rode John E Apparatus for providing a load on a bearing, the bearing having an inner race mounted to a shaft and the bearing retained by a nut
WO2006080356A1 (ja) * 2005-01-25 2006-08-03 Aisin Aw Co., Ltd. プレス加工装置、プレス加工方法、及び打抜き加工品
US20140325840A1 (en) * 2014-07-21 2014-11-06 Caterpillar Inc. Method of manufacturing cylinder line for engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184242A (en) * 1978-03-02 1980-01-22 Petrie John A Beveled retaining ring and method for constructing the same
US4621515A (en) * 1982-03-12 1986-11-11 George Salter & Co. Ltd. Method and apparatus for making circlips
CN102056688A (zh) * 2008-06-06 2011-05-11 盖茨公司 制造环的方法
CN102554080A (zh) * 2011-12-22 2012-07-11 浙江鑫永利卡环有限公司 卡环绕制成型的方法和制造设备
CN103008495A (zh) * 2012-12-24 2013-04-03 江麓机电集团有限公司 一种弹性挡圈加工方法

Also Published As

Publication number Publication date
US10835946B2 (en) 2020-11-17
US20170246675A1 (en) 2017-08-31
EP3212349B1 (de) 2018-09-19
DE102014115727B3 (de) 2016-04-21
EP3212349A1 (de) 2017-09-06
WO2016066720A1 (de) 2016-05-06
CN107206453A (zh) 2017-09-26

Similar Documents

Publication Publication Date Title
CN107206453B (zh) 制造卡环的方法
KR101454793B1 (ko) 핫스탬핑된 초고강도 소재의 프레스 절단금형 손상 방지용 2단계 전단가공방법
CN103624169B (zh) 一种冲压模具生产踏板支架的工艺
US8789449B1 (en) Piercing apparatus with scrap removing capability
JP2017024036A (ja) プレス加工装置
US20090158803A1 (en) Method of Manufactring Ring-Shaped Member
MX2016009876A (es) Metodo de estampacion y metodo para la fabricacion de producto estampado.
KR101776615B1 (ko) 프레스 소성 가공을 이용한 베벨형 스냅링 제조 방법, 이 제조 방법에 사용되는 프레스 금형 및 이를 통해 제조된 베벨형 스냅링
CN204194573U (zh) 发动机齿形链链板连续冲压模
JP6119999B2 (ja) プレス加工方法及びプレス加工装置
JP2017164755A (ja) プレス成形品の製造方法およびプレス成形品
JP5920765B2 (ja) プレス成形体及びこのプレス成形体の製造方法
RU2017101001A (ru) Способ производства столовых приборов и вырубной инструмент для столовых приборов
JP2016124020A (ja) 無段変速機用ベルトのエレメント形成方法及び装置
CN109420881A (zh) 一种浪形保持架的冲压方法
JP2009106961A (ja) プレス成形方法及びプレス成形型
CN106064193B (zh) 一种超高强钢板的冲裁方法
KR20120037645A (ko) 와셔 제조방법
JP2013022607A (ja) 金属シート材の打ち抜き方法及び打ち抜き装置
JP2013059777A (ja) ホットプレス加工方法およびホットプレス加工装置
JP2009183989A (ja) 成形素材及びプレス成形機並びにプレス成形方法
JP2006043719A (ja) 無段変速機用エレメントおよびその製造方法
JP2015229189A (ja) ワッシャ製造方法
KR101569353B1 (ko) 프레스 성형방법
JP2014104490A (ja) ブレーキディスクの製造方法

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