EP0180855B1 - Verfahren zur Steigerung der Dauerfestigkeit von Bauteilen unterschiedlicher Formgebung - Google Patents

Verfahren zur Steigerung der Dauerfestigkeit von Bauteilen unterschiedlicher Formgebung Download PDF

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Publication number
EP0180855B1
EP0180855B1 EP85113475A EP85113475A EP0180855B1 EP 0180855 B1 EP0180855 B1 EP 0180855B1 EP 85113475 A EP85113475 A EP 85113475A EP 85113475 A EP85113475 A EP 85113475A EP 0180855 B1 EP0180855 B1 EP 0180855B1
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EP
European Patent Office
Prior art keywords
workpiece
fatigue strength
increasing
various forms
component parts
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.)
Expired
Application number
EP85113475A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0180855A1 (de
Inventor
Hans Dipl.-Ing. Bäuerle
Hansgeorg Ing. Peste (Grad.)
Erwin Pohlner
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.)
Maschinenfabrik Alfing Kessler GmbH
Original Assignee
Maschinenfabrik Alfing Kessler 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 Maschinenfabrik Alfing Kessler GmbH filed Critical Maschinenfabrik Alfing Kessler GmbH
Publication of EP0180855A1 publication Critical patent/EP0180855A1/de
Application granted granted Critical
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Expired legal-status Critical Current

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Classifications

    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • 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
    • Y10T29/17—Crankshaft making apparatus

Definitions

  • the invention relates to a method for increasing the fatigue strength of large crankshafts and similar workpieces by cold hammering of highly stressed areas with a striking device equipped with a mechanical feed drive, which can be actuated by applying a pressure medium or spring force.
  • DE-AS-1 049 197 also discloses a device for cold hammering the starts on the crank pins of crankshafts for internal combustion engines in order to achieve increased fatigue strength by increasing the local strength, by means of which the crankshaft and the workpiece are rotated uniformly against one another during machining . This is to achieve a uniform hammering effect, as it says there.
  • the invention is based on the finding that it is not possible to precisely match the impact force and the impact distance to the workpiece if the workpiece is rotated during the impact.
  • the invention is therefore based on the object of improving the method of the type mentioned at the outset in such a way that an increase in the fatigue strength beyond the known level is possible.
  • hammering can take place in a localized manner, specifically to the areas which are subject to the highest stress, such as fillets, bore openings and cross-sectional transitions.
  • an apparatus for carrying out the method according to claim 1 consists of a lower part 2, a gear box 3, a support 4 and a plurality of striking devices 9, which act on the workpiece 1 clamped between clamping disks 7.
  • the support 4 and striking means 9 are longitudinally displaceable to enable adaptation to the respective workpiece 1.
  • the details of this property can be considered known and are therefore not described further.
  • the gearbox 3 contains devices which bring about a controllable step-by-step turning of the tensioning disk 7 by means of a rotary drive 6 and, after completion of the turning by means of a control device 8, triggers an impact of the striking device 9 which is adjustable in strength. These devices are also known for other uses and some are commercially available, so that a more detailed description can be omitted.
  • the striking device 9 shown in FIGS. 2 and 3 consists of a base body 10, which is provided with a prismatic system 11 according to the radius of the workpiece to be machined and has guides 12 therein, which guide two strikers 13 in their support plane, and them give freedom in the support angle around the bolt 15, which is considered necessary to adapt to the dimensional relationships of the component 1.
  • the bolt 15 transmits the impact energy to the strikers 13 and is therefore located in a somewhat larger hole in order to allow the strikers 13 to penetrate into the workpiece 1 to be machined.
  • An intermediate part 16 establishes the connection between the percussion piston 17 and the bolt 15, which transmits the impact energy to the striking die 13.
  • a clamping prism 18 via springs 19 with adjustable clamping bolts 20, 21 attached.
  • the impact device 9 is held in an adjustable manner in a clamping device 22 in order to determine its position relative to the workpiece 1.
  • FIG. 1 illustrates an application of the method mentioned in claim 1, namely the processing of two areas simultaneously, which is to be regarded as particularly economical for this application. Machining with only one striker 13 is conceivable and can be carried out by a person skilled in the art using similar means are considered, for which purpose, however, an inclination of the striking device 9 with the application of a tuning as a replacement for the second striker 13 appears to be necessary to absorb the counter-forces that are not balanced. In a similar way, modifications of the device are also conceivable, which enable processing according to the specified method on straight-line and flat components.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Forging (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
EP85113475A 1984-10-23 1985-10-23 Verfahren zur Steigerung der Dauerfestigkeit von Bauteilen unterschiedlicher Formgebung Expired EP0180855B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843438742 DE3438742A1 (de) 1984-10-23 1984-10-23 Verfahren zur steigerung der dauerfestigkeit von bauteilen unterschiedlicher formgebung
DE3438742 1984-10-23

Publications (2)

Publication Number Publication Date
EP0180855A1 EP0180855A1 (de) 1986-05-14
EP0180855B1 true EP0180855B1 (de) 1989-03-08

Family

ID=6248539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113475A Expired EP0180855B1 (de) 1984-10-23 1985-10-23 Verfahren zur Steigerung der Dauerfestigkeit von Bauteilen unterschiedlicher Formgebung

Country Status (3)

Country Link
US (1) US4682489A (it)
EP (1) EP0180855B1 (it)
DE (1) DE3438742A1 (it)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017273A1 (en) * 1990-05-08 1991-11-14 Vysshee Tekhnicheskoe Uchebnoe Zavedenie 'sevmashvtuz' Method and operational technological system for ultrasonic shock treatment
JPH04183211A (ja) * 1990-11-13 1992-06-30 Sumitomo Wiring Syst Ltd 電線のストリップ方法及びそれに使用する電線ほぐし装置
US5493761A (en) * 1994-10-24 1996-02-27 Ingersoll Cm Systems, Inc. Apparatus for fillet rolling of crankshafts
DE10052753A1 (de) * 2000-10-25 2002-05-08 Hegenscheidt Mfd Gmbh & Co Kg Gerät zum Festwalzen von Kurbelwellen
DE60144109D1 (de) 2000-11-22 2011-04-07 Ingersoll Cm Systems Inc Vorrichtung und verfahren für das walzen von werkstücken
US6408663B1 (en) * 2001-02-23 2002-06-25 Short Block Technologies, Inc. Method and apparatus for truing crankshafts
EP1262280B1 (de) * 2001-05-28 2005-11-02 Hegenscheidt-MFD GmbH & Co. KG Vorrichtung zum Festwalzen von Einstichen und Radien der Lagerstellen von Kurbelwellen
DE102004008728B4 (de) * 2004-02-23 2006-06-29 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zur Steigerung der Dauerschwingfestigkeit, insbesondere der Biegewechselfestigkeit und der Torsionswechselfestigkeit von Kurbelwellen
DE102005032185B4 (de) * 2005-07-09 2016-07-21 Volkswagen Ag Verfahren zur Erhöhung der Dauerfestigkeit von Kurbelwellen
RU2571670C2 (ru) * 2013-12-30 2015-12-20 Общество с ограниченной ответственностью "Гефест ПРВ" Способ и устройство отделочно-упрочняющей обработки коленчатых валов
DE102015203487A1 (de) * 2015-02-26 2016-09-01 Ecoroll Ag Werkzeugtechnik Festhammervorrichtung zum Beeinflussen von Werkstücken und zugehöriges Verfahren
RU2625619C1 (ru) * 2016-10-10 2017-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") Способ повышения прочности детали с покрытием
RU2625508C1 (ru) * 2016-10-10 2017-07-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") Способ повышения прочности детали с покрытием
DE102017113078B4 (de) 2017-06-14 2019-05-29 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
DE102017113071A1 (de) 2017-06-14 2018-12-20 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zur Nachbearbeitung einer Kurbelwelle
DE102017113077B4 (de) 2017-06-14 2022-02-03 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
DE102017113065B3 (de) * 2017-06-14 2018-11-15 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
DE102017113070B3 (de) * 2017-06-14 2018-11-15 Maschinenfabrik Alfing Kessler Gmbh Verfahren zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
DE102017113074B3 (de) 2017-06-14 2018-11-15 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Schlagverfestigen eines Übergangsradius einer Kurbelwelle
DE102017113072B4 (de) 2017-06-14 2021-04-08 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
DE102017113088A1 (de) 2017-06-14 2018-12-20 Maschinenfabrik Alfing Kessler Gmbh Verfahren und Vorrichtung zum Kaltverfestigen einer Kurbelwelle
DE102017113066B3 (de) 2017-06-14 2018-11-15 Maschinenfabrik Alfing Kessler Gmbh Verfahren zum Schlagverfestigen von Übergangsradien einer Kurbelwelle
RU179882U1 (ru) * 2017-12-08 2018-05-28 федеральное государственное бюджетное образовательное учреждение высшего образования "Самарский государственный технический университет" Устройство для ультразвуковой финишной обработки наружных цилиндрических поверхностей деталей

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1374877A (en) * 1919-08-14 1921-04-12 Arnold G Carlson Automatic peening apparatus for piston-rings
US1385268A (en) * 1920-12-20 1921-07-19 Anton C Paulson Anvil-vise
GB315216A (en) * 1928-07-09 1930-09-04 Otto Foeppl Method of finishing machine or structural parts and the like
DE920080C (de) * 1948-10-02 1955-11-17 Daimler Benz Ag Zylinder- oder Zylinderkopfgussstuecke von Brennkraftmaschinen
GB811875A (en) * 1955-08-04 1959-04-15 Renault Improvements in or relating to cold-hammering devices for crankshafts
US2888846A (en) * 1956-02-15 1959-06-02 Renault Cold-hammering device
US2841861A (en) * 1956-07-10 1958-07-08 Int Harvester Co Device for cold rolling of crankshaft fillets
GB1009569A (en) * 1963-05-28 1965-11-10 Sonca Ind Ltd Improvements in or relating to the formation of patterned surfaces by peening
US4416130A (en) * 1981-03-20 1983-11-22 Industrial Metal Products Corporation Pulsing impact straightener
JPS58107292A (ja) * 1981-12-21 1983-06-25 Kawasaki Heavy Ind Ltd 管の溶接継手部処理方法及び装置

Also Published As

Publication number Publication date
DE3438742C2 (it) 1988-03-24
DE3438742A1 (de) 1986-04-30
US4682489A (en) 1987-07-28
EP0180855A1 (de) 1986-05-14

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