DE3939935A1 - Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding - Google Patents
Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grindingInfo
- Publication number
- DE3939935A1 DE3939935A1 DE19893939935 DE3939935A DE3939935A1 DE 3939935 A1 DE3939935 A1 DE 3939935A1 DE 19893939935 DE19893939935 DE 19893939935 DE 3939935 A DE3939935 A DE 3939935A DE 3939935 A1 DE3939935 A1 DE 3939935A1
- Authority
- DE
- Germany
- Prior art keywords
- recesses
- machining
- hardening
- crank
- side face
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/06—Milling crankshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B5/18—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning crankshafts, eccentrics, or cams, e.g. crankpin lathes
-
- 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
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
-
- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
-
- 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
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- 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
- B23P2700/07—Crankshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Kurbelwelle gemäß dem Gattungsbegriff des Patentan spruches 1.The invention relates to a method of manufacture a crankshaft according to the generic term of the patent saying 1.
Die Herstellung einer Kurbelwelle geht im allgemeinen von einen Schmiederohling aus, der einer Vergütung mit nach folgender spanabhebender Bearbeitung unterzogen wird.The production of a crankshaft generally starts from a forged blank, which after a remuneration with is subjected to the following machining.
Nach MTZ, Heft 44 (1983) 3 ist es bekannt, den Kurbelzapfen an seinen Enden mit radialen Eindrehungen zu versehen. Eine radiale Lauffläche des Kurbelzapfens ist mit einer Material zugabe für die abschließende Oberflächenbearbeitung versehen, die in einem Walzen mit anschließendem Schleifen besteht. Die Eindrehungen werden zur Verbesserung der Oberflächengüte und zur Verfestigung durch Rollen gewalzt, die sich durch die Verwendung eines sogenannten Spreizstahles auch in die seit lichen Anlaufflächen der Kurbelwangen eindrücken. Ab schließend wird die radiale Lauffläche und die seitlichen Anlaufflächen durch Schleifen auf Endmaß bearbeitet. Ein derartiges Bearbeitungsverfahren des Kurbelzapfens hat den Nachteil, daß beim Walzen der Durchmesser der Rollen natür lich nicht beliebig klein gewählt werden kann, so daß die tragende Fläche des Kurbelzapfens durch die relativ großen Radien der Eindrehungen nicht unerheblich geschmälert wird. According to MTZ, Issue 44 (1983) 3, it is known the crank pin to be provided with radial recesses at its ends. A radial tread of the crank pin is made of one material allowance for the final surface treatment, which consists of rolling followed by grinding. The Twists are used to improve the surface finish and rolled for solidification by rollers which are formed by the Use of a so-called expansion steel also in the Press in the contact surfaces of the crank webs. From the radial tread and the side closes Contact surfaces machined to final dimensions by grinding. A Such processing method of the crank pin has the Disadvantage that the diameter of the rollers naturally when rolling Lich can not be chosen arbitrarily small, so that the bearing area of the crank pin due to the relatively large Radii of the twists is not insignificantly reduced.
Ein weiterer Nachteil besteht in der notwendigen Nacharbeit der seitlichen Anlaufflächen, was zu einer Kostensteigerung der Herstellung führt.Another disadvantage is the necessary rework of the lateral contact surfaces, which leads to an increase in costs the manufacturing leads.
Ausgehend vom Herstellungsverfahren gemäß dem Gattungsbegriff des Patentanspruches 1 liegt der Erfindung die Aufgabe zu grunde, den Fertigungsaufwand bei der Herstellung von Kurbel wellen zu senken, ohne daß die Dauerfestigkeit Schaden er leidet.Based on the manufacturing process according to the generic term of claim 1, the invention is the object reasons, the manufacturing effort in the manufacture of crank lower waves without damaging the fatigue strength suffers.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches 1.This task is solved by the characteristic features of claim 1.
Durch die auf Fertigmaß gebrachten Eindrehungen bei gleich zeitiger Bearbeitung der Anlaufflächen wird eine nachträg liche Bearbeitung der Anlaufflächen durch Schleifen über flüssig, was durch Einsparung eines Arbeitsganges zu einer Reduzierung der Fertigungskosten führt. Dadurch, daß die Lauf flächen des Kurbelzapfens und der Bereich der Eindrehungen induktiv oberflächengehärtet werden ergibt sich trotz der Eindrehung kein Verlust an Dauerfestigkeit, da die Spannung an der Eindrehung durch die Kerbwirkung zwar um den Faktor der Formzahl erhöht wird, von der Erhöhung der zulässigen Spannung als Folge der Härtung jedoch überkompensiert wird.Thanks to the screwed-in dimensions at the same time early processing of the contact areas will be a retrospective processing of the contact surfaces by grinding over liquid, which can be achieved by saving one operation Reduction of manufacturing costs leads. Because the barrel surfaces of the crank pin and the area of the turns are inductively surface hardened despite the Screwing in no loss of fatigue strength because of the tension at the indentation by the notch effect by a factor the number of forms is increased by the increase in the permissible However, tension as a result of the hardening is overcompensated.
Ein weiteres Merkmal der Erfindung zeichnet sich dadurch aus, daß das spanabhebende Werkzeug ein Formfräser oder Formdrehstahl ist.Another feature of the invention is characterized by this from that the cutting tool is a form cutter or Forming tool is.
Mit derartigen Werkzeugen wird die Eindrehung des Radius und zugleich die Bearbeitung der Anlaufflächen in axialer Richtung vorgenommen.With such tools, the turning of the radius and at the same time machining the contact surfaces in the axial Direction.
Eine Kröpfung einer Kurbelwelle hergestellt nach dem erfin dungsgemäßen Verfahren ist in einer Zeichnung dargestellt.A crankshaft crank made according to the inventions The method according to the invention is shown in a drawing.
Die Kröpfung wird gebildet aus den beiden Kurbelwangen 1, einem Kurbelzapfen 2 und seitlichen Anlaufflächen 3. Bei der Herstellung der Kurbelwelle wird der Kurbelzapfen 2 des Rohlings mit einem spanabhebenden Werkzeug 1 bearbeitet. Dieses Werkzeug kann ein Formdrehstahl oder ein Formfräser sein. Erfindungsgemäß muß das Werkzeug definierte Schneiden aufweisen, welche in einem Arbeitsgang die Eindrehungen 4 und eine Lauffläche 5 herstellen und die seitlichen Anlaufflächen 3 bearbeiten. Während die Eindrehungen 4 und die Anlaufflächen 3 mit dem Werkzeug 6 auf Fertigmaß bearbeitet werden, läßt man auf dem Kurbelzapfen 2 eine Schleifzugabe für die Lauffläche 5. Nach der Bearbeitung mit dem spanabhebenden Werkzeug 6 - bei spielsweise ein Formfräser oder Formdrehstahl - erfolgt eine Oberflächenhärtung der Lauffläche 5 und der Eindrehungen 4. Anschließend wird nur noch die Lauffläche 5 geschliffen.The crank is formed from the two crank webs 1 , a crank pin 2 and lateral contact surfaces 3 . In the manufacture of the crankshaft, the crank pin 2 of the blank is machined with a cutting tool 1 . This tool can be a form turning tool or a form cutter. According to the invention, the tool must have defined cutting edges, which produce the indentations 4 and a running surface 5 and machine the lateral thrust surfaces 3 in one operation. While the indentations 4 and the contact surfaces 3 are machined to the finished dimension with the tool 6 , a grinding allowance for the contact surface 5 is left on the crank pin 2 . After machining with the cutting tool 6 - for example a form cutter or form turning tool - the surface of the tread 5 and the indentations 4 is hardened. Then only the tread 5 is ground.
Durch die Oberflächenhärtung wird die durch die Eindrehungen 4 hervorgerufene Spannungserhöhung durch erhöhte Festigkeit über kompensiert.Due to the surface hardening, the increase in tension caused by the indentations 4 is compensated for by increased strength.
Durch die Eindrehungen wird die Bearbeitung des Übergangsradius von der Lauffläche 5 zur Anlauffläche 3 überflüssig, so daß besonders bei Reparaturen den Werkstätten die Nacharbeit der Laufflächen 5 wesentlich erleichtert wird. Die Anlaufflächen 3 werden nur noch durch den Formfräser oder den Formdrehstahl bearbeitet, ein Schleifen hat sich als nicht notwendig erwiesen.Due to the screwing in, the machining of the transition radius from the tread 5 to the thrust surface 3 is superfluous, so that the repair of the treads 5 is made considerably easier, particularly for repairs. The contact surfaces 3 are only machined by the form cutter or the turning tool, grinding has not proven to be necessary.
Da die Eindrehungen 4 kleiner sind als die üblicherweise ver wendeten Übergangsradien ist die tragende Lauffläche 5 breiter, was sich durch geringere Flächenbelastung der Lauffläche und damit durch geringeren Verschleiß bemerkbar macht.Since the indentations 4 are smaller than the transition radii usually used, the load-bearing tread 5 is wider, which is noticeable by lower surface loading of the tread and thus by less wear.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893939935 DE3939935A1 (en) | 1989-12-02 | 1989-12-02 | Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19893939935 DE3939935A1 (en) | 1989-12-02 | 1989-12-02 | Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3939935A1 true DE3939935A1 (en) | 1991-06-06 |
DE3939935C2 DE3939935C2 (en) | 1993-03-18 |
Family
ID=6394696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19893939935 Granted DE3939935A1 (en) | 1989-12-02 | 1989-12-02 | Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3939935A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999017899A1 (en) * | 1997-10-06 | 1999-04-15 | Widia Gmbh | Cutter insert, milling tool and use of the milling tool |
WO2003062654A1 (en) * | 2002-01-24 | 2003-07-31 | Hegenscheidt-Mfd Gmbh & Co. Kg | Method for machining crankpins of a crankshaft |
DE10218630A1 (en) * | 2002-04-25 | 2003-11-06 | Sandvik Ab | Milling cutter with fine adjustment |
DE19922046C2 (en) * | 1998-05-19 | 2003-11-20 | Honda Motor Co Ltd | Method of forming a crankshaft and method of manufacturing a crankshaft |
WO2004014600A1 (en) | 2002-08-06 | 2004-02-19 | Hegenscheidt-Mfd Gmbh & Co. Kg | Method for finishing crankshafts for motor vehicle engines |
US7882633B2 (en) * | 2004-11-26 | 2011-02-08 | Niles-Simmons Industrieanlagen Gmbh | Method for machining shaft bearing seats |
US9358605B2 (en) | 2011-05-17 | 2016-06-07 | Erwin Junker Maschinenfabrik Gmbh | Method and production line for machining a crankshaft |
CN111531338A (en) * | 2020-06-19 | 2020-08-14 | 重庆美心翼申机械股份有限公司 | Crankshaft machining method |
CN111644949A (en) * | 2020-06-03 | 2020-09-11 | 大连理工大学 | Polishing device for crankshaft of diesel engine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19739366A1 (en) * | 1997-09-09 | 1999-03-18 | Kennametal Inc | Side milling cutters and a suitable insert |
DE102010025132B4 (en) | 2009-07-14 | 2022-01-13 | Volkswagen Ag | Method of manufacturing a crankshaft |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2209945A1 (en) * | 1972-03-02 | 1973-09-13 | Maschf Augsburg Nuernberg Ag | METHOD OF MANUFACTURING A CRANKSHAFT AND A CRANKSHAFT MANUFACTURED AFTER THAT |
DE2448118A1 (en) * | 1974-10-09 | 1976-04-22 | Maschf Augsburg Nuernberg Ag | Crankshafts with hardened fillets between web and journals - and pins are roll-hardened after final turning |
DE2142324C3 (en) * | 1971-08-24 | 1978-08-17 | Prince Machines Ltd., Kingston- Upon-Thames, Surrey (Grossbritannien) | Crankshaft grinding machine |
DD142858A5 (en) * | 1978-04-18 | 1980-07-16 | Gfm Fertigungstechnik | METHOD FOR PROCESSING CRANKSHAFTS |
DE2913865A1 (en) * | 1979-04-06 | 1980-10-23 | Daimler Benz Ag | Crankshaft in IC engines, esp. for motor vehicles - where journals and fillets are surface hardened, and then middle zone of journals is tempered to permit inexpensive straightening of shaft |
DE2138599C2 (en) * | 1971-08-02 | 1983-02-03 | Daimler-Benz Ag, 7000 Stuttgart | Process for surface hardening of crankshafts for motor vehicles |
-
1989
- 1989-12-02 DE DE19893939935 patent/DE3939935A1/en active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2138599C2 (en) * | 1971-08-02 | 1983-02-03 | Daimler-Benz Ag, 7000 Stuttgart | Process for surface hardening of crankshafts for motor vehicles |
DE2142324C3 (en) * | 1971-08-24 | 1978-08-17 | Prince Machines Ltd., Kingston- Upon-Thames, Surrey (Grossbritannien) | Crankshaft grinding machine |
DE2209945A1 (en) * | 1972-03-02 | 1973-09-13 | Maschf Augsburg Nuernberg Ag | METHOD OF MANUFACTURING A CRANKSHAFT AND A CRANKSHAFT MANUFACTURED AFTER THAT |
DE2448118A1 (en) * | 1974-10-09 | 1976-04-22 | Maschf Augsburg Nuernberg Ag | Crankshafts with hardened fillets between web and journals - and pins are roll-hardened after final turning |
DD142858A5 (en) * | 1978-04-18 | 1980-07-16 | Gfm Fertigungstechnik | METHOD FOR PROCESSING CRANKSHAFTS |
DE2913865A1 (en) * | 1979-04-06 | 1980-10-23 | Daimler Benz Ag | Crankshaft in IC engines, esp. for motor vehicles - where journals and fillets are surface hardened, and then middle zone of journals is tempered to permit inexpensive straightening of shaft |
Non-Patent Citations (1)
Title |
---|
Motortechnische Zeitschrift 44, 1983, Heft 3, S.97-102 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999017899A1 (en) * | 1997-10-06 | 1999-04-15 | Widia Gmbh | Cutter insert, milling tool and use of the milling tool |
DE19922046C2 (en) * | 1998-05-19 | 2003-11-20 | Honda Motor Co Ltd | Method of forming a crankshaft and method of manufacturing a crankshaft |
WO2003062654A1 (en) * | 2002-01-24 | 2003-07-31 | Hegenscheidt-Mfd Gmbh & Co. Kg | Method for machining crankpins of a crankshaft |
DE10218630A1 (en) * | 2002-04-25 | 2003-11-06 | Sandvik Ab | Milling cutter with fine adjustment |
WO2004014600A1 (en) | 2002-08-06 | 2004-02-19 | Hegenscheidt-Mfd Gmbh & Co. Kg | Method for finishing crankshafts for motor vehicle engines |
US7827684B2 (en) | 2002-08-06 | 2010-11-09 | Hegenscheidt-Mfd Gmbh & Co. Kg | Process for finish-machining crank shafts for motor car engines |
US7882633B2 (en) * | 2004-11-26 | 2011-02-08 | Niles-Simmons Industrieanlagen Gmbh | Method for machining shaft bearing seats |
US9358605B2 (en) | 2011-05-17 | 2016-06-07 | Erwin Junker Maschinenfabrik Gmbh | Method and production line for machining a crankshaft |
CN111644949A (en) * | 2020-06-03 | 2020-09-11 | 大连理工大学 | Polishing device for crankshaft of diesel engine |
CN111644949B (en) * | 2020-06-03 | 2021-07-16 | 大连理工大学 | Polishing device for crankshaft of diesel engine |
CN111531338A (en) * | 2020-06-19 | 2020-08-14 | 重庆美心翼申机械股份有限公司 | Crankshaft machining method |
Also Published As
Publication number | Publication date |
---|---|
DE3939935C2 (en) | 1993-03-18 |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |