EP2981383A1 - Bearbeitungsprozess für axial niedrige trapezringe für kolben von brennkraftmaschinen - Google Patents
Bearbeitungsprozess für axial niedrige trapezringe für kolben von brennkraftmaschinenInfo
- Publication number
- EP2981383A1 EP2981383A1 EP14707167.4A EP14707167A EP2981383A1 EP 2981383 A1 EP2981383 A1 EP 2981383A1 EP 14707167 A EP14707167 A EP 14707167A EP 2981383 A1 EP2981383 A1 EP 2981383A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- trapezoidal
- piston
- machining
- flanks
- 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.)
- Withdrawn
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/06—Profile cutting tools, i.e. forming-tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
- F16J9/203—Oil-scraping rings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/22—Rings for preventing wear of grooves or like seatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/04—Overall shape
- B23B2200/0485—Trapezium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/24—Components of internal combustion engines
- B23B2215/245—Pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/24—Components of internal combustion engines
- B23B2215/247—Piston rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2220/00—Details of turning, boring or drilling processes
- B23B2220/12—Grooving
Definitions
- the invention relates to a trapezoidal ring, the production of a groove for this trapezoidal ring in the piston and a composite of a piston with such a trapezoidal ring.
- Trapezoidal rings for pistons which are inserted into corresponding grooves in the ring field of the piston, are known, for example from EP 0 398 993 B1 (DE 689 19 074 T2), DE 41 19 908 A1, DE 1 1 201 1 100 377 T5 DE 10 2007 057 840 A1, DE 196 16 474 A1, DE 30 345 19 C2 or DE 944 761.
- the trapezoidal annular grooves disclosed in the aforementioned documents are not suitable for accommodating trapezoidal rings of axially small height, which leads to a larger expansion of the piston in the direction parallel to the piston stroke.
- DE 43 41 386 C2 discloses a sealing unit for pistons of internal combustion engines with a arranged in the land of the piston annular groove with a conically shaped upper groove flank for receiving a trained with a corresponding flank piston ring.
- the piston ring is located at the upper region of the piston facing the combustion chamber, which leads to increased wear of the piston ring.
- a trapezoidal ring is provided, which has a trapezoidal cross-section and at the same time has a reduced overall height compared with known trapezoidal rings.
- the maximum height of the trapezoidal ring pointing inwards in the direction of the piston stroke axis is less than or equal to 1 mm.
- the trapezoidal annular groove is produced in two steps.
- a tool steel which, viewed from the outside inwards in the direction of the piston stroke axis, has a trapezoidal profile and which has two flanks or surfaces aligned parallel to one another on the inwardly pointing end.
- the groove is pre-punched and in a second step, the groove flanks are then finished, so that the correspondingly shaped trapezoidal and a low profile exhibiting ring can be inserted into this groove.
- a trapezoidal ring is used with a correspondingly low height and such a piston can be installed in the cylinder of an internal combustion engine.
- a method for producing a piston for internal combustion engines with a circumferential trapezoidal annular groove for receiving axially low trapezoidal rings, comprising a groove base with adjoining surfaces and groove flanks according to the invention is created in a first step of the groove base with the adjoining surfaces by machining with a tool steel and in a further process step, the groove flanks are created.
- the machining of the annular groove takes place in such a way that the surfaces adjoining the groove base are parallel or nearly parallel to each other.
- the tool life can be significantly increased and the inclusion of the trapezoidal ring to the groove base is thus guaranteed.
- the machining of the annular groove takes place in such a way that the groove flanks are oriented trapezoidally relative to one another. Due to the funnel-shaped or trapezoidal arrangement of the groove flanks the inclusion of the trapezoidal ring is facilitated to the groove base.
- the method is carried out such that the groove base after machining has a height of less than 2 mm, preferably less than 1, 5 mm, in particular less than 1 mm.
- the trapezoidal annular groove can accommodate trapezoidal rings with a small axial extent. As a result, in turn, a low piston height can be realized.
- the tool steel for carrying out a method is designed such that the tool steel has parallel or almost parallel surfaces at its end forming the subsequent groove bottom. As a result, a low overall height in the region of the groove base can be achieved with high tool life and the resulting low wear.
- Tool steel is designed so that connect to the almost parallel surfaces of the piston stroke axis outwardly oriented trapezoidal surfaces.
- the advantage is that in the first method step already the future position of the groove flanks is formed to each other. In a further method step, only the exact measure of the trapezoidal groove surfaces has to be worked out of one another.
- FIG. 1 shows the schematic representation of a piston
- FIG. 2 shows a detail of a ring field with a trapezoidal groove corresponding to the actual state
- FIG. 3 shows a schematic sectional view of a tool steel according to the actual state
- FIG. 4 shows a sectional view of a trapezoidal groove after the first processing step according to the invention
- FIG. 5 shows a schematic sectional view of a tool steel for
- FIG. 6 shows a schematic sectional view of a trapezoidal groove after carrying out the second processing step according to the invention.
- FIGS 2 and 3 show the actual state and Figures 1, 4, 5 and 6 show the solution according to the invention.
- top, bottom, left, right, front, back, etc. refer exclusively to the example representation and position of the device and other elements selected in the respective figures. These terms are not intended to be limiting, that is to say that different positions and / or mirror-symmetrical design or the like may change these references.
- FIG. 1 shows a schematic view of a piston 1 with a trapezoidal radially encircling annular groove 2, the groove flanks 3, 4 and a Groove 5 has. Adjacent to the groove bottom 5 flanks 6, 7 are arranged which are oriented almost parallel to each other.
- the annular groove 2 is part of a ring field 8, which has further differently configured annular grooves 9, 10 and 1 1.
- the minimum height hi of the annular groove 2 in this example case is 1, 96 mm.
- the ideal case shown there that the trapezoidal groove continues to converge further inward, for example, to a height h 2 of 0.17 mm, can not be represented in practice, as with tool steels 12 with a height h 3 less than or equal to 1 mm wear takes place.
- This wear is due to the complete trapezoidal shape of the surfaces 13, 14 from outside to inside in the direction of the piston stroke axis (when viewed in Figure 3 of the tool steel 12 shown there from left to right).
- a radius Ri of 0.3 is provided for the transition from the groove bottom 5 to the flanks 6, 7, for example.
- the opening angle ⁇ is provided, for example, at 15 degrees and 12 minutes.
- a groove 2 In contrast, according to the solution according to the invention (shown in FIG. 4), provision is made for a groove 2 to be initially punched.
- a special tool steel 15 (shown in FIG. 5) is used with regard to its cross section.
- the cross section runs initially from the outside in the direction inwards with trapezoidal surfaces 16, 17 and then runs in two parallel surfaces 18, 19 from.
- the groove 2 With this cross section of the illustrated tool steel, the groove 2 is pre-pierced, so that a groove base 5 in the height h of at least one millimeter or even smaller can be realized.
- a radius R2 of 0.2 is provided for the transition from the groove bottom 5 to the flanks 6, 7, for example.
- the opening angle ⁇ is provided, for example, at 15 degrees and 12 minutes.
- the groove flanks 3, 4 are finished, so that with a second, correspondingly shaped in cross-section Tool steel (not shown) not all the material from the piston blank must be worked out, but that only superficially a processing of the groove flanks 3, 4 takes place.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013205879 | 2013-04-03 | ||
DE102013221395.6A DE102013221395A1 (de) | 2013-04-03 | 2013-10-22 | Bearbeitungsprozess für axial niedrige Trapezringe für Kolben von Brennkraftmaschinen |
PCT/EP2014/053918 WO2014161696A1 (de) | 2013-04-03 | 2014-02-28 | Bearbeitungsprozess für axial niedrige trapezringe für kolben von brennkraftmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2981383A1 true EP2981383A1 (de) | 2016-02-10 |
Family
ID=51567619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14707167.4A Withdrawn EP2981383A1 (de) | 2013-04-03 | 2014-02-28 | Bearbeitungsprozess für axial niedrige trapezringe für kolben von brennkraftmaschinen |
Country Status (7)
Country | Link |
---|---|
US (1) | US10197161B2 (de) |
EP (1) | EP2981383A1 (de) |
CN (1) | CN105377482B (de) |
BR (1) | BR112015024586A2 (de) |
DE (1) | DE102013221395A1 (de) |
MX (1) | MX366438B (de) |
WO (1) | WO2014161696A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013219052A1 (de) * | 2013-09-23 | 2015-04-09 | Mahle International Gmbh | Kolben mit Kolbenringnut, insbesondere Kompressionsnut |
CN104454226A (zh) * | 2014-12-12 | 2015-03-25 | 陶凝 | 一种发动机活塞总成 |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE944761C (de) | 1951-09-21 | 1956-06-21 | Alois Gabriel Dr Ing | Kolbenabdichtung mittels Kolbenringen, insbesondere fuer Zweitaktmaschinen |
US2963329A (en) * | 1957-07-26 | 1960-12-06 | Daimler Benz Ag | Piston for an internal combustion engine |
FR1540312A (fr) * | 1967-02-17 | 1968-09-27 | Ensemble piston et segments pour moteur à combustion interne | |
US3843138A (en) * | 1972-11-24 | 1974-10-22 | Int Harvester Co | Sheet metal compression ring |
US3980521A (en) | 1974-08-28 | 1976-09-14 | Novo Industri A/S | Immobilization of glucose isomerase |
JPS5151580U (de) * | 1974-10-18 | 1976-04-19 | ||
JPS6031846Y2 (ja) * | 1979-04-04 | 1985-09-24 | ワタナベエンジニアリング株式会社 | 溝切りバイト |
JPS55147210A (en) | 1979-05-07 | 1980-11-17 | Sumitomo Chem Co Ltd | Fungicide composition for rice crop |
US4299401A (en) | 1979-09-12 | 1981-11-10 | Ramsey Corporation | Piston ring and method of making same |
JPS63154120A (ja) | 1986-12-18 | 1988-06-27 | 松下電器産業株式会社 | 自動製パン機 |
JPH0440822Y2 (de) * | 1987-03-30 | 1992-09-25 | ||
JPH0266903A (ja) | 1988-08-31 | 1990-03-07 | Tokin Corp | 小形コイル及びその製造方法 |
US4867119A (en) | 1988-10-21 | 1989-09-19 | Caterpillar Inc. | Engine piston assembly and forged piston member therefor having a cooling recess |
JPH0266903U (de) * | 1988-11-11 | 1990-05-21 | ||
JPH04117956U (ja) * | 1991-04-04 | 1992-10-22 | 帝国ピストンリング株式会社 | 組合せオイルリング |
DE4119908A1 (de) | 1991-06-17 | 1992-12-24 | Mahle Gmbh | Kolben, insbesondere fuer verbrennungsmotoren |
DE4341386C2 (de) | 1993-12-04 | 1998-03-19 | Ae Goetze Gmbh | Dichtungseinheit für Kolben von Brennkraftmaschinen |
US5598763A (en) * | 1994-03-14 | 1997-02-04 | Ford Motor Company | Flutter free piston ring assembly |
DE19616474A1 (de) | 1996-04-25 | 1997-08-07 | Bayerische Motoren Werke Ag | Kolben mit Ringanordnung für Hubkolbenmaschinen, insbesondere Brennkraftmaschinen |
JPH10202406A (ja) | 1997-01-22 | 1998-08-04 | Akebono Brake Ind Co Ltd | 溝入れバイト |
JP4382229B2 (ja) * | 2000-01-20 | 2009-12-09 | 帝国ピストンリング株式会社 | 組合せオイルリング |
IL154649A (en) * | 2003-02-27 | 2007-10-31 | Uzi Gati | Cutting placement for diligent operations |
DE10311155A1 (de) * | 2003-03-14 | 2004-09-23 | Gapi Technische Produkte Gmbh | Dichtring und Dichtringanordnung |
JP2007105844A (ja) | 2005-10-14 | 2007-04-26 | Nidec Tosok Corp | 切削工具 |
DE102007057840A1 (de) | 2007-11-30 | 2009-06-04 | Ks Kolbenschmidt Gmbh | Funktionsoptimierte Gestaltung des Kolben-Ringfeldbereiches bei Stahlkolben |
CN201284698Y (zh) * | 2008-09-12 | 2009-08-05 | 山东滨州渤海活塞股份有限公司 | 销孔镶铜质衬套式内冷结构活塞 |
DE102009040084A1 (de) | 2009-09-04 | 2011-03-10 | Mahle International Gmbh | Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor |
JP5794634B2 (ja) | 2010-01-29 | 2015-10-14 | 日本ピストンリング株式会社 | ピストンリング |
EP2407265B1 (de) | 2010-07-17 | 2020-01-08 | Rolf Rombach | Werkzeug zum Einbringen eines Innengewindes, Verfahren zum Herstellen eines Holzverbundes mit einem derartigen Werkzeug und mit einem derartigen Verfahren hergestellte Holzwand |
CN202493352U (zh) * | 2011-12-29 | 2012-10-17 | 安徽省恒泰动力科技有限公司 | 一种中型重载柴油机用活塞 |
US9027462B2 (en) * | 2012-01-11 | 2015-05-12 | GM Global Technology Operations LLC | Piston ring with improved lubrication delivery |
-
2013
- 2013-10-22 DE DE102013221395.6A patent/DE102013221395A1/de not_active Ceased
-
2014
- 2014-02-28 BR BR112015024586A patent/BR112015024586A2/pt not_active Application Discontinuation
- 2014-02-28 CN CN201480026102.9A patent/CN105377482B/zh active Active
- 2014-02-28 WO PCT/EP2014/053918 patent/WO2014161696A1/de active Application Filing
- 2014-02-28 MX MX2015013680A patent/MX366438B/es active IP Right Grant
- 2014-02-28 EP EP14707167.4A patent/EP2981383A1/de not_active Withdrawn
- 2014-02-28 US US14/782,109 patent/US10197161B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014161696A1 * |
Also Published As
Publication number | Publication date |
---|---|
US10197161B2 (en) | 2019-02-05 |
CN105377482B (zh) | 2018-05-22 |
US20160025219A1 (en) | 2016-01-28 |
BR112015024586A2 (pt) | 2017-07-18 |
WO2014161696A1 (de) | 2014-10-09 |
MX2015013680A (es) | 2016-06-30 |
MX366438B (es) | 2019-07-09 |
CN105377482A (zh) | 2016-03-02 |
DE102013221395A1 (de) | 2014-10-09 |
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