WO2004007141A1 - Verfahren zum herstellen eines pleuels einer hubkolbenmaschine - Google Patents
Verfahren zum herstellen eines pleuels einer hubkolbenmaschine Download PDFInfo
- Publication number
- WO2004007141A1 WO2004007141A1 PCT/EP2003/007218 EP0307218W WO2004007141A1 WO 2004007141 A1 WO2004007141 A1 WO 2004007141A1 EP 0307218 W EP0307218 W EP 0307218W WO 2004007141 A1 WO2004007141 A1 WO 2004007141A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connecting rod
- eye
- blank
- rod eye
- laser cutting
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/04—Connecting rods
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49288—Connecting rod making
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49288—Connecting rod making
- Y10T29/49291—Connecting rod making including metal forging or die shaping
Definitions
- the invention relates to a method for producing a connecting rod of a reciprocating piston machine from a cast or forged blank with a large and a small connecting rod eye, the large connecting rod eye being divided in a preprocessing step along a parting plane running through the eye axis, previously in a first clamping of the blank the front flat surfaces are ground.
- the connecting rod blank is first pre-ground on its flat surfaces, after which the bearing bore e.g. is divided by sawing and pre-drilled after the two parts have been clamped together (cf. DE 4306280 AI).
- the bearing bore of the blank is expediently oval, so that a circular cross-section is formed after taking the saw cut into account.
- the two connecting rod parts are processed separately in a machining center, namely by milling the parting surfaces, spindles the fitting bores and cutting the threads for the clamping screws and milling the contact surfaces for the screw heads.
- the fine machining only takes place after the two connecting rod parts have been screwed together, namely the final grinding of the flat surfaces, the fine drilling of the bearing eye and the bush pressed into the piston pin bore.
- a certain simplification can be achieved by the also known manufacturing method of connecting rod manufacturing (cf. DE 19829147 AI).
- connecting rod manufacturing cf. DE 19829147 AI
- two diametrically opposed laser notches are made on the inner circumferential surface of the large connecting rod eye (cf. DE 19534360 C2).
- the elaborate separating cut for producing the two workpiece parts, connecting rod and connecting rod cover, is indeed omitted here; on the other hand, there are increased expenses on the device side, since it is important to transmit particularly high breaking forces on the one hand and, on the other hand, to absorb them using suitable tensioning devices and to remove them in the device base or the foundations.
- the present invention has for its object to improve the known manufacturing processes by reducing the manufacturing effort while improving the requirements for automation and environmental friendliness.
- this object is achieved in connection with the method mentioned in the introduction in that after grinding the flat surfaces of the blank in a second clamping operation, first the contour of the large connecting rod eye and then the division pattern in the parting plane are generated by laser cutting.
- Newer technologies enable the use of laser cutting with high precision, even from relatively strong starting materials for reasonable investments. For example, workpieces with a material thickness of approx. 30 mm can be processed at a cutting speed of approx. 400 mm / min. The control of the cutting process takes place with an accuracy of at least 0.1 mm center deviation with a cutting width of approximately 0.2 mm.
- the contour of the large connecting rod eye corresponds to a circular cut, the diameter of which is undersized from 0.5 to 1.5 mm compared to the bearing diameter, preferably 0.6 to 1.0 mm.
- the contour of the large connecting rod eye corresponds to an oval cut, with a longitudinal extension of 0.5 to 2 mm, preferably approximately 1 mm, being symmetrical to the parting plane.
- the cutting width of about 0.2 mm which is already small in laser cutting
- the Material removal due to the later finishing of the parting surfaces must be taken into account.
- the undersize parts of the circular arc must be produced as listed above, so that there is sufficient waste for the subsequent finishing of the large and small connecting rod eyes by fine drilling, which may be preceded by a pre-spindle.
- the small connecting rod eye can also be cut from solid material, so that there is no need for cores when forging or casting the blank. It goes without saying that after laser cutting the small connecting rod eye and before inserting the bearing bush, a fine machining of the eye, e.g. by spindles or rubbing is appropriate.
- Such fine machining also takes place on the large connecting rod eye, namely after the connecting rod and connecting rod cover have been screwed on, the fine machining again being carried out by spindles or rubbing. Another fine boring process can follow. The latter also applies to the small connecting rod eye after inserting the bearing bush, which is machined in the same setting as the large connecting rod eye.
- the workpiece is further processed in a conventional manner as a connecting rod and connecting rod cover after the preliminary processing by laser cutting in a third setting in a machining center.
- the inclusion of laser cutting in the connecting rod manufacturing process gives clear advantages that speak in favor of the use of this new technology in the pre-processing of the blanks. With a small cutting width and the associated material savings, every chip is avoided. This not only has an advantageous impact in terms of the associated lower environmental impact; by avoiding large chip volumes, the difficulties associated with their elimination in automation are avoided.
- both the separating cut and the production of the two connecting rod eyes are carried out by laser cutting, there is also a significant reduction in the machining time compared to conventional machining.
- a particular advantage in favor of laser cutting is the associated extremely low clamping forces as a result of the very low cutting pressures during laser cutting. This fact favors the fixture construction, which is important for automation. Relatively small clamping devices are sufficient to hold the workpiece during laser cutting, as a result of which the costs of the clamping devices and the space requirement associated therewith are noticeably reduced.
- Laser cutting can be used on both cast and forged blanks.
- 42 CrMo4 is suitable as forged steel.
- FIG. 1 is a view of a connecting rod blank
- FIG. 1 is a side view of FIG. 1,
- Fig. 5 is a view of the connecting rod
- FIG. 6 shows a side view of FIG. 5.
- a connecting rod blank 1 which can be made as a cast or forged part. It has two connecting rod eyes, namely the small connecting rod eye 2 and the large connecting rod eye 3.
- the so-called piston pin bore arises from the small connecting rod eye 2, which engages around the piston pin of the piston when installed in a reciprocating piston engine;
- the so-called bearing bore which engages around the crankshaft during installation, is created from the large connecting rod eye 3.
- the cutting plane of the laser cut is specified, by which the parting plane 4 between the connecting rod 5 and the connecting rod cover 6 is defined.
- Flat surfaces 13 form the end faces of the connecting rod eyes.
- a circular cross section of the large connecting rod eye 3 is provided.
- the intended cutting width of the laser cut of approximately 0.2 mm and the reworking of the parting surfaces are balanced must be that the diameter of the circular laser cut is dimensioned with a corresponding undersize, which is preferably between 0.6 and 1.0 mm. Only by boring in the course of the subsequent finishing does a circular hole in the form of the bearing hole again result, in which a bearing shell is received during later installation.
- the laser can also be guided after an oval cut by straightening the bearing eye on both sides of the parting plane.
- the cross-sectional shape of the large connecting rod eye is made up of the two opposite semicircular sections and the straight extension of approx. 1 mm connecting them on both sides, so that an oval is created overall.
- the parting surfaces adjacent to the parting plane 4 which are initially formed by laser cutting, e.g. processed by milling until the exact semicircular dimension is reached.
- the small connecting rod eye 2 it is produced by a correspondingly circular laser cut with a small undersize, which is later finished by spindles or rubbing, so that a bearing bush can be fitted therein.
- the connecting rod blank 1 can already have a corresponding bore for the small connecting rod eye 2, as shown in FIGS. 1 and 2.
- the small connecting rod eye 2 but can also be made from solid material by laser cutting.
- FIG. 3 shows the connecting rod 5 after machining the parting surfaces 7 and drilling the fitting bore 8 and screwing in the thread 9 for the clamping screws for connecting the connecting rod 5 to the connecting rod cover 6, which is shown in FIG. 4.
- the fitting bore 8 of the connecting rod cover 6 is followed by a slightly larger connecting bore 10, at the mouth of which the head 11 of the respective clamping screw is supported, as shown in FIGS. 5 and 6 using the example of the fully assembled connecting rod 12.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03763716A EP1521662A1 (de) | 2002-07-16 | 2003-07-05 | Verfahren zum herstellen eines pleuels einer hubkolbenmaschine |
US10/829,617 US20050005443A1 (en) | 2002-07-16 | 2004-04-19 | Method for producing a connecting rod for a reciprocating-piston engine |
US10/917,135 US20050015982A1 (en) | 2002-07-16 | 2004-08-12 | Method for producing a connecting rod for a reciprocating-piston engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10232265.1 | 2002-07-16 | ||
DE10232265A DE10232265B3 (de) | 2002-07-16 | 2002-07-16 | Verfahren zum Herstellen eines Pleuels einer Hubkolbenmaschine |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/829,617 Continuation US20050005443A1 (en) | 2002-07-16 | 2004-04-19 | Method for producing a connecting rod for a reciprocating-piston engine |
US10/917,135 Continuation US20050015982A1 (en) | 2002-07-16 | 2004-08-12 | Method for producing a connecting rod for a reciprocating-piston engine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004007141A1 true WO2004007141A1 (de) | 2004-01-22 |
Family
ID=30010077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/007218 WO2004007141A1 (de) | 2002-07-16 | 2003-07-05 | Verfahren zum herstellen eines pleuels einer hubkolbenmaschine |
Country Status (4)
Country | Link |
---|---|
US (2) | US20050005443A1 (de) |
EP (1) | EP1521662A1 (de) |
DE (1) | DE10232265B3 (de) |
WO (1) | WO2004007141A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107498191A (zh) * | 2017-09-29 | 2017-12-22 | 中车戚墅堰机车车辆工艺研究所有限公司 | 夹具及模锻件飞边处理方法 |
CN107962361A (zh) * | 2017-12-13 | 2018-04-27 | 薛璐浩 | 一种连杆齿形及其加工方法 |
CN110653566A (zh) * | 2019-09-27 | 2020-01-07 | 宜昌江峡船用机械有限责任公司 | 路面破碎车激振梁制备方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10232265B3 (de) * | 2002-07-16 | 2004-02-26 | Motorenfabrik Hatz Gmbh & Co Kg | Verfahren zum Herstellen eines Pleuels einer Hubkolbenmaschine |
WO2006051822A1 (ja) * | 2004-11-09 | 2006-05-18 | Honda Motor Co., Ltd. | コネクティングロッドの検査装置及び検査方法 |
DE102006030699B4 (de) * | 2006-06-30 | 2014-10-02 | Daimler Ag | Gegossener Stahlkolben für Verbrennungsmotoren |
US20120102740A1 (en) * | 2010-11-01 | 2012-05-03 | Charles Preston Gros | Hull floor support system |
CN103702796B (zh) * | 2011-05-13 | 2016-10-12 | Etxe-Tar有限公司 | 机床 |
DE102012111124B3 (de) * | 2012-11-19 | 2013-12-05 | Thyssenkrupp Presta Teccenter Ag | Gebaute Kurbelwelle sowie Verfahren zur Herstellung einer gebauten Kurbelwelle |
KR102121918B1 (ko) * | 2013-12-20 | 2020-06-11 | 삼성전자주식회사 | 홈 네트워크 시스템에서 이벤트 통지 방법 및 장치 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01104435A (ja) * | 1987-10-15 | 1989-04-21 | Mazda Motor Corp | アルミニウム部品の製造方法 |
EP0342800A2 (de) * | 1988-05-17 | 1989-11-23 | Ford Motor Company Limited | Herstellung eines mit einer Bruchstelle versehenen Pulvermetall-Pleuels |
DE4007437A1 (de) * | 1990-03-09 | 1991-09-12 | Bayerische Motoren Werke Ag | Verfahren zum fertigen eines pleuels |
DE4306280A1 (de) * | 1993-03-01 | 1994-09-08 | Krebsoege Gmbh Sintermetall | Verfahren zum Herstellen eines Bauteils mit wenigstens einer geteilten Lauffläche für Wälzkörper |
DE19829147A1 (de) * | 1998-06-30 | 2000-01-05 | Volkswagen Ag | Bauteil und Verfahren zum Trennen eines Bauteiles |
US6134779A (en) * | 1998-11-16 | 2000-10-24 | Walker; Bruce K. | High performance forged aluminum connecting rod and method of making the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5208979A (en) * | 1991-09-19 | 1993-05-11 | Howard Schmidt | Prefracture laser formation of a stress riser groove |
DE19534360C2 (de) * | 1995-02-06 | 1999-03-04 | Mauser Werke Oberndorf Maschin | Verfahren und Einrichtung zum Bruchtrennen von Pleueln |
US6742253B2 (en) * | 2001-06-29 | 2004-06-01 | Gkn Sinter Metals | Process for eliminating vertical flash on an as-forged connecting rod |
DE10232265B3 (de) * | 2002-07-16 | 2004-02-26 | Motorenfabrik Hatz Gmbh & Co Kg | Verfahren zum Herstellen eines Pleuels einer Hubkolbenmaschine |
US6915568B2 (en) * | 2002-12-23 | 2005-07-12 | Metaldyne Company Llc | Method of manufacturing connecting rods |
-
2002
- 2002-07-16 DE DE10232265A patent/DE10232265B3/de not_active Expired - Fee Related
-
2003
- 2003-07-05 EP EP03763716A patent/EP1521662A1/de not_active Withdrawn
- 2003-07-05 WO PCT/EP2003/007218 patent/WO2004007141A1/de not_active Application Discontinuation
-
2004
- 2004-04-19 US US10/829,617 patent/US20050005443A1/en not_active Abandoned
- 2004-08-12 US US10/917,135 patent/US20050015982A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01104435A (ja) * | 1987-10-15 | 1989-04-21 | Mazda Motor Corp | アルミニウム部品の製造方法 |
EP0342800A2 (de) * | 1988-05-17 | 1989-11-23 | Ford Motor Company Limited | Herstellung eines mit einer Bruchstelle versehenen Pulvermetall-Pleuels |
DE4007437A1 (de) * | 1990-03-09 | 1991-09-12 | Bayerische Motoren Werke Ag | Verfahren zum fertigen eines pleuels |
DE4306280A1 (de) * | 1993-03-01 | 1994-09-08 | Krebsoege Gmbh Sintermetall | Verfahren zum Herstellen eines Bauteils mit wenigstens einer geteilten Lauffläche für Wälzkörper |
DE19829147A1 (de) * | 1998-06-30 | 2000-01-05 | Volkswagen Ag | Bauteil und Verfahren zum Trennen eines Bauteiles |
US6134779A (en) * | 1998-11-16 | 2000-10-24 | Walker; Bruce K. | High performance forged aluminum connecting rod and method of making the same |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 013, no. 318 (M - 852) 19 July 1989 (1989-07-19) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107498191A (zh) * | 2017-09-29 | 2017-12-22 | 中车戚墅堰机车车辆工艺研究所有限公司 | 夹具及模锻件飞边处理方法 |
CN107962361A (zh) * | 2017-12-13 | 2018-04-27 | 薛璐浩 | 一种连杆齿形及其加工方法 |
CN110653566A (zh) * | 2019-09-27 | 2020-01-07 | 宜昌江峡船用机械有限责任公司 | 路面破碎车激振梁制备方法 |
CN110653566B (zh) * | 2019-09-27 | 2022-01-18 | 宜昌江峡船用机械有限责任公司 | 路面破碎车激振梁制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1521662A1 (de) | 2005-04-13 |
US20050015982A1 (en) | 2005-01-27 |
US20050005443A1 (en) | 2005-01-13 |
DE10232265B3 (de) | 2004-02-26 |
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