DE3929267A1 - Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts - Google Patents

Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts

Info

Publication number
DE3929267A1
DE3929267A1 DE19893929267 DE3929267A DE3929267A1 DE 3929267 A1 DE3929267 A1 DE 3929267A1 DE 19893929267 DE19893929267 DE 19893929267 DE 3929267 A DE3929267 A DE 3929267A DE 3929267 A1 DE3929267 A1 DE 3929267A1
Authority
DE
Germany
Prior art keywords
connecting rod
sintered
nitriding
casting
plain bearing
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Withdrawn
Application number
DE19893929267
Other languages
German (de)
Inventor
Joachim Fabrittus
Wilhelm Platzbaecker
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.)
Platzbaecker Wilhelm Fabritius Joachim 8000 Mue
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19893929267 priority Critical patent/DE3929267A1/en
Publication of DE3929267A1 publication Critical patent/DE3929267A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/003—Articles made for being fractured or separated into parts
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Powder Metallurgy (AREA)

Abstract

A sintered or cast piston machine connecting rod has at least one bearing surface which is treated against wear. This treatment can pref. be the inclusion in the sintering or casting of ring shaped elements of a material with better wear resistance than the core material. Also the treatment can pref. be nitriding. ADVANTAGE - Lower prodn. costs and assembly time. Improved lubrication properties.

Description

Die Erfindung betrifft ein Sinter- oder Gußpleuel für eine Kolbenmaschine, das mit zumindest einem Gleitlager für einen Wellenzapfen oder Bolzen versehen ist. Dabei sind eine Vielzahl von möglichen Gleitlagerwerkstoffen bekannt. In Stahlpleueln kommen grundsätzlich Lager­ schalen aus Weißmetallen oder Bronzen zum Einsatz. Leichtmetallpleuel hingegen können mit einer unmittelbar auf das Pleuel galvanisch aufgebrachten Laufschicht versehen sein. Bei Gußpleueln kann unter geringen Belastungsanforderungen die Gleitlager-Lauffläche ebenfalls direkt aus dem Pleuelwerkstoff herausgear­ beitet sein. Sinterpleuel werden analog den Stahlpleueln mit separaten Lagerschalen versehen.The invention relates to a sintered or cast connecting rod for a piston engine with at least one plain bearing is provided for a shaft journal or bolt. Here are a variety of possible plain bearing materials known. Bearings generally come in steel connecting rods shells made of white metals or bronzes. Light metal connecting rods, on the other hand, can be used directly on the connecting rod galvanically applied running layer be provided. With cast connecting rods, under low Load requirements the plain bearing tread also directly out of the connecting rod material be prepared. Sintered connecting rods are analogous to steel connecting rods provided with separate bearing shells.

Im Rahmen neuer Fertigungstechnologien wird angestrebt, die Lagerstellen von Pleueln und dabei insbesondere das große Pleuelauge durch Brechen, sog. Cracken, zu teilen. Dieses vereinfachte Fertigungsverfahren eignet sich für Sinterpleuel oder Gußpleuel. Es ist jedoch mit hohem Aufwand verbunden, an ein derartiges gebrochenes Pleuel­ auge die bislang üblichen Lagerschalen anzupassen.As part of new manufacturing technologies, the aim is the conrod bearings and especially that to divide the large connecting rod eye by cracking. This simplified manufacturing process is suitable for Sintered connecting rods or cast connecting rods. However, it is high Effort connected to such a broken connecting rod eye to adapt to the usual cups.

Aufgabe der Erfindung ist es, Maßnahmen aufzuzeigen, mit Hilfe derer auf die aufwendige Verwendung separater Lagerschalen an einem Sinter- oder Gußpleuel verzichtet werden kann.The object of the invention is to demonstrate measures with Help those on the elaborate use of separate Bearing shells on a sintered or cast connecting rod are dispensed with can be.

Zur Lösung der Aufgabe ist vorgesehen, daß die Gleit­ lager-Lauffläche unter Durchführung verschleißfestig­ keitssteigernder Maßnahmen aus dem Pleuel herausgear­ beitet ist.To solve the problem it is provided that the sliding bearing tread with wear-resistant passage measures to increase the efficiency of the connecting rod is finished.

Mit Hilfe derartiger Maßnahmen - zwei bevorzugte Maßnahmen sind in den Unteransprüchen angegeben - ist es möglich, den insbesondere unter Verschleißaspekten für eine Lager-Gleitfläche ungeeigneten Grundwerkstoff des Pleuels auch dem Einsatz als Gleitlager-Lauffläche zuzuführen.With the help of such measures - two preferred Measures are specified in the subclaims - is it is possible, especially considering wear unsuitable base material for a bearing sliding surface the connecting rod can also be used as a sliding bearing tread feed.

Bei einem Sinterpleuel liegt vorteilhafterweise hiermit unter Entfall einer separaten Lagerschale ein optimale Schmierverhältnisse gewährleistender Lagerwerkstoff vor. Aufgrund der porösen Oberflächenstruktur können sich hierbei Schmiermitteltaschen bilden. Allerdings ist es nicht möglich, den für die Herstellung eines Sinter­ pleuels geeigneten Sinter-Grundwerkstoff als Gleit­ lager-Lauffläche übermäßig hoch zu belasten. Hierin ist letztlich der Grund dafür zu sehen, daß Sinterpleuel bislang mit separaten bewährten Lagerschalen versehen werden.In the case of a sintered connecting rod, this advantageously lies an optimal one without the need for a separate bearing shell Bearing material ensuring lubrication conditions. Due to the porous surface structure form lubricant pockets. However it is not possible for the manufacture of a sinter connecting rod suitable sintered base material as sliding load the bearing tread excessively high. Here is ultimately the reason to see that sintered connecting rods previously provided with separate, proven bearing shells will.

Als verschleißfestigkeitssteigernde Maßnahme bietet sich die Härtung, und dabei beispielsweise die Nitrierhärtung an. Diese Härtung bietet dabei für das bereits ange­ sprochene Fertigungsverfahren des Crackens weitere Vorteile. Der an sich vorteilhafte, jedoch technisch schwer zu beherrschende Crack-Vorgang wird durch die vorangehende Härtung vereinfacht, da hierbei auch die Sprödigkeit des Pleuelwerkstoffes zunimmt.This is a measure that increases wear resistance hardening, and for example nitriding at. This hardening offers already for that spoken manufacturing processes of cracking further Advantages. The advantageous in itself, but technically The cracking process is difficult to master due to the  previous hardening simplified, since this also The brittleness of the connecting rod material increases.

Es ist aber auch möglich, gemäß Anspruch 3 beim Sinte­ rungsprozeß oder beim Gießen in die Pleuelform zumindest ein Ringelement einzuformen, das seinerseits die Gleit­ lager-Lauffläche bildet. Dieses Ringelement bildet somit eine kompakte Baueinheit mit dem Pleuel und kann aus einem den Lageranforderungen genügenden Werkstoff vorgefertigt sein. Gedacht ist hierbei beispielsweise an ein Sinterringelement mit einer gegenüber dem Sinter- Grundwerkstoff höheren Karbidzugabe. Es kann aber auch ein beliebiges anderes sprödes, crackbares Material zum Einsatz kommen.However, it is also possible, according to claim 3, for sins process or when pouring into the connecting rod shape at least to form a ring element, which in turn the sliding bearing tread forms. This ring element thus forms a compact unit with the connecting rod and can from a material that meets the storage requirements be prefabricated. For example, a sintered ring element with a Base material higher carbide addition. But it can also any other brittle, crackable material for Come into play.

Da ein erfindungsgemäßes Pleuel nicht mit Lagerschalen versehen ist, muß - um Kantenträger zu vermeiden - die Lagergeometrie entsprechend ausgebildet sein. Gedacht ist hierbei insbesondere an eine ballige Formgebung, es können aber auch die Randkanten mit Fasen versehen sein.Since a connecting rod according to the invention is not equipped with bearing shells is provided, the - Bearing geometry should be designed accordingly. I thought is here in particular a spherical shape, it but can also be chamfered on the edges.

Ein Ausführungsbeispiel für die Erfindung ist nicht gezeigt, da es anhand obiger Erläuterungen dem Fachmann möglich ist, ein erfindungsgemäßes Pleuel zu fertigen. Die Auswahl der jeweils zum Einsatz kommenden Materia­ lien erfolgt dabei unter Berücksichtigung der Festig­ keitsanforderungen sowie der im Gleitlager-Laufflächen­ bereich anzutreffenden Reibpaarung.An embodiment of the invention is not shown because it is based on the above explanations to the expert it is possible to manufacture a connecting rod according to the invention. The selection of the materials used in each case lien takes place taking into account the Festig requirements as well as in the plain bearing treads area encountered friction pairing.

Claims (3)

1. Sinter- oder Gußpleuel für eine Kolbenmaschine mit zumindest einem Gleitlager für einen Wellenzapfen oder Bolzen, wobei die Gleitlager-Lauffläche unter Durchführung verschleißfestigkeitssteigernder Maßnahmen aus dem Pleuel herausgearbeitet ist.1. Sintered or cast connecting rods for a piston machine with at least one plain bearing for a shaft journal or bolts, with the plain bearing tread under Implementation to increase wear resistance Measures from the connecting rod is worked out. 2. Sinter- oder Gußpleuel nach Anspruch 1, dadurch gekennzeichnet, daß die Gleitlager-Lauf­ fläche gehärtet, insbesondere nitriergehärtet ist.2. sintered or cast connecting rods according to claim 1, characterized in that the plain bearing barrel surface hardened, in particular nitrided. 3. Sinter- oder Gußpleuel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Gleitlager-Lauf­ fläche Bestandteil eines beim Sinterungs- oder Gießprozeß in die Pleuelform eingefügten Ringele­ mentes ist, wobei der Werkstoff des Ringelementes gegenüber dem Grundwerkstoff des Pleuels von höherer Abriebfestigkeit ist.3. sintered or cast connecting rods according to claim 1 or 2, characterized in that the plain bearing barrel surface part of a sintering or Casting process in the conrod inserted ringele is mentes, the material of the ring element compared to the connecting rod base material from is higher abrasion resistance.
DE19893929267 1989-09-02 1989-09-02 Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts Withdrawn DE3929267A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893929267 DE3929267A1 (en) 1989-09-02 1989-09-02 Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893929267 DE3929267A1 (en) 1989-09-02 1989-09-02 Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts

Publications (1)

Publication Number Publication Date
DE3929267A1 true DE3929267A1 (en) 1991-03-07

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DE19893929267 Withdrawn DE3929267A1 (en) 1989-09-02 1989-09-02 Connecting rod bearings for piston engines - has hardened surfaces made direct in the casting or sintering process with nitriding or sintered inserts

Country Status (1)

Country Link
DE (1) DE3929267A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118040A1 (en) * 1991-06-01 1992-12-03 Glyco Metall Werke Prodn. of sintered metal or drop forged finished part - by inserting antifriction moulding into blank and then forging
DE4118041A1 (en) * 1991-06-01 1992-12-03 Glyco Metall Werke Sintered metal part with direct coating bearing metal layer - mfd. by pressing and sintering in swaging die having bearing metal introduced into die pref. as powder
DE4230080A1 (en) * 1992-09-09 1994-03-10 Hugo Kunz Piston for metal die casting process - has wear-resistant ring to increase work life
DE19524251C1 (en) * 1995-07-04 1997-02-13 Supervis Ets Process for producing a sintered molded part
DE19756509B4 (en) * 1996-12-20 2005-12-08 Fuji Jukogyo K.K. Connecting rod with slanted large connecting rod eye

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521578C (en) * 1929-05-15 1931-03-24 Nomy Ab Block storage
DE747963C (en) * 1936-10-07 1944-10-23 Ohio Crankshaft Company Process for the production of multi-part, bush-less bearing bodies
CH252414A (en) * 1945-05-25 1947-12-31 Hermes Patentverwertungs Gmbh Shaft mounted in a plain bearing.
DE862693C (en) * 1951-06-17 1953-01-12 Eisenwerke Ag Deutsche Wear-resistant machine parts sliding on each other
DE752538C (en) * 1938-06-05 1953-02-09 Hans Vogt Process for the production of machine parts subject to friction
US3770332A (en) * 1971-06-14 1973-11-06 Federal Mogul Corp Composite heavy-duty bushing and method of making the same
DE2718994A1 (en) * 1976-04-28 1977-11-17 Volvo Penta Ab PUSH ROD, METHOD FOR MANUFACTURING A PUSH ROD AND MOLD FOR MANUFACTURING A PUSH ROD
DE3137752A1 (en) * 1980-09-26 1982-08-05 Metal Leve S.A. Indústria e Comércio, 04746 Sao Paulo BEARING ALLOY, METHOD FOR THEIR PRODUCTION AND METHOD FOR THE PRODUCTION OF A COMPOSITE STRIP FROM SUCH A BEARING ALLOY
EP0167320A2 (en) * 1984-07-02 1986-01-08 General Motors Corporation Method of making a split bearing assembly
DE3635837A1 (en) * 1986-10-22 1988-04-28 Krupp Gmbh SLIDING BEARING WITH EXPANSION COMPENSATING ELEMENTS
DD268034A1 (en) * 1987-12-14 1989-05-17 Elektrogeraete Ingbuero Veb METHOD FOR THE PRODUCTION AND ELEMENT OF A SINTERED METAL BEARING

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521578C (en) * 1929-05-15 1931-03-24 Nomy Ab Block storage
DE747963C (en) * 1936-10-07 1944-10-23 Ohio Crankshaft Company Process for the production of multi-part, bush-less bearing bodies
DE752538C (en) * 1938-06-05 1953-02-09 Hans Vogt Process for the production of machine parts subject to friction
CH252414A (en) * 1945-05-25 1947-12-31 Hermes Patentverwertungs Gmbh Shaft mounted in a plain bearing.
DE862693C (en) * 1951-06-17 1953-01-12 Eisenwerke Ag Deutsche Wear-resistant machine parts sliding on each other
US3770332A (en) * 1971-06-14 1973-11-06 Federal Mogul Corp Composite heavy-duty bushing and method of making the same
DE2718994A1 (en) * 1976-04-28 1977-11-17 Volvo Penta Ab PUSH ROD, METHOD FOR MANUFACTURING A PUSH ROD AND MOLD FOR MANUFACTURING A PUSH ROD
DE3137752A1 (en) * 1980-09-26 1982-08-05 Metal Leve S.A. Indústria e Comércio, 04746 Sao Paulo BEARING ALLOY, METHOD FOR THEIR PRODUCTION AND METHOD FOR THE PRODUCTION OF A COMPOSITE STRIP FROM SUCH A BEARING ALLOY
EP0167320A2 (en) * 1984-07-02 1986-01-08 General Motors Corporation Method of making a split bearing assembly
DE3635837A1 (en) * 1986-10-22 1988-04-28 Krupp Gmbh SLIDING BEARING WITH EXPANSION COMPENSATING ELEMENTS
DD268034A1 (en) * 1987-12-14 1989-05-17 Elektrogeraete Ingbuero Veb METHOD FOR THE PRODUCTION AND ELEMENT OF A SINTERED METAL BEARING

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
- DE-Buch: BENSINGER, Wolf-Dieter u. MEIER *
Alfred: Kolben, Pleuel und Kurbelwelle bei schnellaufenden Verbrennungsmotoren, Springer-Verlag, Berlin,Göttigen,Heidelberg 1961, S.52 *
DE-AN D 1084 Ib/49l v. 18.Oktober 1951 *
DE-AN D 87722 Ib/49i v. 18.Juni 1953 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118040A1 (en) * 1991-06-01 1992-12-03 Glyco Metall Werke Prodn. of sintered metal or drop forged finished part - by inserting antifriction moulding into blank and then forging
DE4118041A1 (en) * 1991-06-01 1992-12-03 Glyco Metall Werke Sintered metal part with direct coating bearing metal layer - mfd. by pressing and sintering in swaging die having bearing metal introduced into die pref. as powder
DE4230080A1 (en) * 1992-09-09 1994-03-10 Hugo Kunz Piston for metal die casting process - has wear-resistant ring to increase work life
DE4230080C2 (en) * 1992-09-09 1998-04-09 Hugo Kunz Die casting pistons, in particular for cold chamber die casting machines
DE19524251C1 (en) * 1995-07-04 1997-02-13 Supervis Ets Process for producing a sintered molded part
DE19756509B4 (en) * 1996-12-20 2005-12-08 Fuji Jukogyo K.K. Connecting rod with slanted large connecting rod eye

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: PLATZBAECKER, WILHELM FABRITIUS, JOACHIM, 8000 MUE

8141 Disposal/no request for examination