WO2004073925A1 - Verfahren zur feinbearbeitung einer zylindrischen innenfläche - Google Patents
Verfahren zur feinbearbeitung einer zylindrischen innenfläche Download PDFInfo
- Publication number
- WO2004073925A1 WO2004073925A1 PCT/EP2003/014502 EP0314502W WO2004073925A1 WO 2004073925 A1 WO2004073925 A1 WO 2004073925A1 EP 0314502 W EP0314502 W EP 0314502W WO 2004073925 A1 WO2004073925 A1 WO 2004073925A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- honing
- cone
- cylindrical inner
- area
- fine
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
- B24B33/025—Internal surface of conical shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
Definitions
- the invention relates to a method for fine machining a cylindrical inner surface according to the preamble of claim 1.
- DE 196 05 588 C2 describes a method in which a cylinder running surface is treated in an upper and lower dead center of a piston in such a way that it withstands higher wear conditions in these areas.
- the known prior art is limited to the fine machining of a surface that has the same surface material throughout.
- the cylinder surface is represented by different materials. This is a softer area, which is formed, for example, by the cast material of the cylinder crankcase, and a harder area, which is represented by a cylinder liner.
- fine machining, especially honing is particularly difficult because the machining means used, e.g. B. the honing stone, smeared by the softer material and loses its grinding effect.
- the object of the invention is to finish cylindrical inner surfaces that have different materials so that the service life of the processing means are significantly improved.
- the solution of the invention consists in a method according to claim 1.
- the inventive method according to claim 1 is characterized in that a cylindrical inner surface, in particular a cylinder liner which has at least one softer and at least one harder area in the axial direction, is finely machined by honing steps, a pre-honing step (pre-honing) and a fine honing step (fine honing).
- Honing is understood here to mean any type of fine machining in which surface areas are removed by the action of abrasive particles. These abrasive particles are usually bound in a honing stone that is attached to a honing stone.
- a cone is introduced during the honing along a cylinder axis, which extends from the harder area to the softer area. This cone is compensated for during the fine honing in the harder area up to an interface between the harder area and the softer area, so that in the end state there is again a cylindrical inner surface in the harder area. The cone is retained in the softer area. The cone, which crosses the boundary between the softer and harder areas, prevents the extremely fine abrasive particles on a honing stone from smearing through the material of the softer area.
- the cone is introduced through a conical or honing stone aligned along a cone. Due to the conical or conical honing stone, the cone can already be specified by the tool and is exactly adhered to.
- the cone is introduced by a conventional honing stone, the honing stone and the honing stone are controlled by the process parameters in such a way that increasing material removal takes place along the feed direction, which leads to the formation of the cone.
- the process parameters that have the greatest influence on the formation of the cone are a feed rate of the honing tool along a cylinder axis and a contact pressure of the honing tool against the cylindrical inner surface.
- honing stones are attached to a honing stone, which can each be extended or retracted for the corresponding application (for example pre-honing or fine honing).
- the cone which is introduced along the cylinder running surface according to the invention, generally has a small radius change between 10 ⁇ m and 100 ⁇ m. This change in radius extends along the cylindrical inner surface over a length of between 20 mm and 200 mm. To avoid a discrete step in the softer area, the cone can open into an opposite cone, which leads to a convex shape in the softer area.
- the convex shape can help reduce noise in engine operation.
- FIG. 1 shows a section through an unprocessed cylinder liner with a harder area (top) and a softer area (bottom),
- Fig. 2c a Vorhonen with a honing stone, which is occupied with two types of honing stones and
- Fig. 3 shows a cylinder liner in the honed state
- FIGS. 2a-c illustrate the method according to the invention in a simplified form, with FIGS. 2a-c showing alternative configurations for the introduction of a cone 11.
- an unworked cylinder surface 2 is shown as a cross section.
- the cylinder running surface 2 is divided into a harder area 4 and a softer area 6.
- the transition 14 between the areas is discrete in this embodiment, but a smooth transition is also conceivable.
- the harder area 4 of the cylinder running surface 2 is usually represented by a cylinder liner, which for example consists of a hypereutectic aluminum-silicon alloy.
- the alloy has a silicon content of approximately 25%.
- the high silicon content leads to a high hardness for aluminum alloys.
- the softer area 6 consists of a conventional aluminum die-casting alloy.
- the cylinder liner is possibly machined by a pre-turning, not shown in the figures, so that, due to production, coarser areas of the surface are smoothed for the subsequent honing.
- a honing stone 7 with - usually several - honing stones 8 is inserted into the cylinder liner 2.
- the honing stones 8 on the honing 7 are oriented obliquely with respect to an axial direction (cylinder central axis) 9, so that a cone 11 is formed along the cylinder running surface 2. It is also appropriate if the honing stones 8 already have a conical shape.
- the cone 11 has a length 10 of approximately 100 mm and a radius change 12 of approximately 20 ⁇ m. It should thus be noted that the cone in FIGS. 2a-c and FIG. 3 is shown exaggerated for reasons of better illustration.
- the honing stone 7 with the honing stones 8 is moved on the one hand with a feed V along the cylinder central axis 9, on the other hand the honing stone 7 is rotated about its own axis and in addition a rotating movement along a wall of the cylinder running surface 2 is described by the honing stone 7.
- the honing stones 8, which are used for pre-honing, are preferably set with diamonds as grinding particles. there on average, the diamonds have a larger diameter than the abrasive particles used in fine honing.
- the honing stone 8 is moved over the harder region 4 of the cylinder liner 2, the transition 14 to the softer region 6 being exceeded.
- the coarse grinding particles are designed in such a way that they are not smeared by the aluminum alloy in the softer area 6. The service life of the honing stone 8 is thus not significantly impaired.
- a conventional honing sheath 7 ⁇ is used to represent the cone 11, in which honing stones 16 are aligned largely parallel to the cylinder central axis 9.
- the cone 11 is introduced in such a way that the feed V is correspondingly slowed down in the direction of the softer region 6 and / or the dwell time at a lower reversal point of the honing zone 7 ⁇ is correspondingly lengthened.
- a honing stone 18 which contains (at least) two types of honing stones which can be moved out and back as required.
- One of the- like honahle 18 is also referred to as double expandable honahle.
- the double-expandable honing stone contains at least one set of honing stones 20 for pre-honing and one set of honing stones 22 for fine honing.
- the honing 18 does not have to be exchanged for fine honing, which will be described below.
- the double expandable honing honing can optionally be equipped with an angled honing stone analogous to FIG. 2a for pre-honing, or it may be subjected to the suitable control according to FIG. 2b. In both cases the cone 11 is shown.
- the harder area 4 is finely honed to the desired tolerance and surface quality with a fine honing stone 26, 22 (FIG. 3).
- the cylinder liner 2 has in the harder region 4 the cylindrical (or, depending on the requirement, almost cylindrical) shape, which is necessary for an optimal piston movement.
- the cone 11 is retained in the softer region 6 and merges into a counter cone 30 to avoid an undesired step.
- a convex shape 28 is formed in the softer area 6 by the rest of the cone 11 and the cone 30.
- This convex shape in the lower area of the cylinder liner leads to better piston guidance and to a significant reduction in piston noise and therefore offers a comfort advantage in engine operation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03785876A EP1594655A1 (de) | 2003-02-19 | 2003-12-18 | Verfahren zur feinbearbeitung einer zylindrischen innenfl ch e |
JP2004568414A JP2006513872A (ja) | 2003-02-19 | 2003-12-18 | 円筒形内面の精密機械加工方法 |
US10/546,134 US20070060025A1 (en) | 2003-02-19 | 2003-12-18 | Method for finely processing a cylindrical inner surface |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10306864A DE10306864B3 (de) | 2003-02-19 | 2003-02-19 | Verfahren zur Feinbearbeitung einer zylindrischen Innenflächen |
DE10306864.3 | 2003-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004073925A1 true WO2004073925A1 (de) | 2004-09-02 |
Family
ID=32404444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/014502 WO2004073925A1 (de) | 2003-02-19 | 2003-12-18 | Verfahren zur feinbearbeitung einer zylindrischen innenfläche |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070060025A1 (de) |
EP (1) | EP1594655A1 (de) |
JP (1) | JP2006513872A (de) |
DE (1) | DE10306864B3 (de) |
WO (1) | WO2004073925A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012201342A1 (de) * | 2012-01-31 | 2013-08-01 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Herstellung einer Innenfläche einer Bohrung mit lokal unterschiedlichen Rauheitsstrukturen und Bauteil mit einer Bohrung mit lokal unterschiedlichen Rauheitsstrukturen |
AT517140B1 (de) | 2015-04-20 | 2017-02-15 | Tyrolit - Schleifmittelwerke Swarovski K G | Schleifwerkzeug |
CN107735202B (zh) * | 2015-05-26 | 2019-04-09 | 格林技术有限公司 | 用于利用珩磨工具制造旋转对称的、非柱形孔的方法 |
CN108127484B (zh) * | 2017-11-29 | 2019-09-06 | 北京空间机电研究所 | 一种使用拼接环粘接的反射镜光学加工方法及加工装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1278184A (fr) * | 1960-10-28 | 1961-12-08 | Dispositif pour l'usinage interne des alésages | |
US5331775A (en) * | 1992-09-08 | 1994-07-26 | Jason, Inc. | Honing process with rough honing tool and finish honing tool on same rotating head |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0390938A1 (de) * | 1989-04-01 | 1990-10-10 | Maschinenfabrik Gehring GmbH & Co. | Verfahren zum Honen von Bohrungen und Honmaschine zur Durchführung des Verfahrens |
US5305556A (en) * | 1989-06-19 | 1994-04-26 | Kopp Verfahrenstechnik Gmbh | Method and apparatus for shaping the interior surfaces of bores |
EP0565742B1 (de) * | 1992-04-11 | 1995-03-01 | Maschinenfabrik Gehring GmbH & Co. | Verfahren zur Feinbearbeitung von Werkstück-Oberflächen |
IT1262263B (it) * | 1993-12-30 | 1996-06-19 | Delle Vedove Levigatrici Spa | Procedimento di levigatura per profili curvi e sagomati e macchina levigatrice che realizza tale procedimento |
DE4432514A1 (de) * | 1994-09-13 | 1996-03-14 | Thielenhaus Ernst Kg | Verfahren zum abtragenden, hochgenauen Bearbeiten von zylindrischen Flächen an Werkstücken aus einer härtbaren Eisenlegierung |
DE19605588C2 (de) * | 1996-02-15 | 1998-07-02 | Ae Goetze Gmbh | Verfahren zur Bearbeitung einer Zylinderlaufbahn bei Brennkraftmaschinen |
US6203410B1 (en) * | 1998-09-14 | 2001-03-20 | Kabushiki Kaisha Takezawa Seiki | Reamer with adjustable expansion/contraction, and bore finishing machine comprising the same |
DE10225514B4 (de) * | 2002-06-10 | 2005-02-17 | Kadia Produktion Gmbh + Co. | Maschine zur Feinstbearbeitung von Werkstücken durch Honen oder Feinstschleifen |
-
2003
- 2003-02-19 DE DE10306864A patent/DE10306864B3/de not_active Expired - Fee Related
- 2003-12-18 EP EP03785876A patent/EP1594655A1/de not_active Withdrawn
- 2003-12-18 WO PCT/EP2003/014502 patent/WO2004073925A1/de active Application Filing
- 2003-12-18 US US10/546,134 patent/US20070060025A1/en not_active Abandoned
- 2003-12-18 JP JP2004568414A patent/JP2006513872A/ja not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1278184A (fr) * | 1960-10-28 | 1961-12-08 | Dispositif pour l'usinage interne des alésages | |
US5331775A (en) * | 1992-09-08 | 1994-07-26 | Jason, Inc. | Honing process with rough honing tool and finish honing tool on same rotating head |
Also Published As
Publication number | Publication date |
---|---|
JP2006513872A (ja) | 2006-04-27 |
US20070060025A1 (en) | 2007-03-15 |
DE10306864B3 (de) | 2004-07-01 |
EP1594655A1 (de) | 2005-11-16 |
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