CH229277A - Process for reducing wear and improving the running properties of piston pins for internal combustion engine pistons. - Google Patents
Process for reducing wear and improving the running properties of piston pins for internal combustion engine pistons.Info
- Publication number
- CH229277A CH229277A CH229277DA CH229277A CH 229277 A CH229277 A CH 229277A CH 229277D A CH229277D A CH 229277DA CH 229277 A CH229277 A CH 229277A
- Authority
- CH
- Switzerland
- Prior art keywords
- internal combustion
- combustion engine
- improving
- running properties
- engine pistons
- Prior art date
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/10—Connection to driving members
- F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
- F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical Treatment Of Metals (AREA)
Description
Verfahren zur Verminderung des Verschleisses und Verbesserung der Laufeigenschaften von Kolbenbolzen für Brennkraftmasehinenkolben. Es ist bekannt, dass blanke Stahlteile da durch gegen schädlichen Rostansatz ge schützt werden können, dass man sie mit einer Oxyd- oder Hydrogydschicht von ge- eigneter chemischer Zusammensetzung über zieht ("brüniert").
Man glaubte aber bisher auf das Brünier- und ähnliche Oxydations verfahren bei der Behandlung von solchen Maschinenteilen, die unter den beim Betrieb von Brennkraftmaschinen auftretenden Ver hältnissen gleitender Reibung ausgesetzt sind, verzichten zu müssen. Beispielsweise ist davor gewarnt worden, Kolbenringe der art zu behandeln, weil sonst der Verschleiss vorgang und die Laufeigenschaften ungün stig beeinflusst werden.
Es wurde nun von Dipl. Ing. A. Moser und E. Vetter gefunden, .dass im Gegensatz dazu eine Verminderung des Verschleisses und eine Verbesserung der Laufeigenschaf- ten: von Kolbenbolzen für Brennkraftmaschi- nenkolben dadurch erzielt werden kann, dass die Bolzen durch Tauchen in stark alkalische Lösungen, z. B. in heisse konzentrierte Na tronlauge, brüniert werden.
Vergleichsver suche ergaben zum Beispiel, .dass bei Kolben bolzen mit tauchbrünierter Oberfläche nach 185 Betriebsstunden der Verschleiss durch schnittlich noch nicht einmal halb so gross war als bei unter sonst gleichen Bedingun gen ebenso lange gelaufenen unbehandelten Bolzen.
Da,dumch das Brünieren die Masse,der be handelten Bolzen praktisch nicht verändert werden, erübrigt sich eine besondere Nach behandlung. Ferner wird das bisher notwen dige Einfetten, in :0ilpapier verpacken und vor dem Einbau wieder Entfernen der als Rostschutz dienenden Fettschicht, das nicht nur sehr zeitraubend ist, sondern auch grosse Mengen wertvoller Rohstoffe verbraucht, erspart.
Process for reducing the wear and tear and improving the running properties of piston pins for internal combustion engine pistons. It is known that bare steel parts can be protected against harmful rust build-up by coating them with an oxide or hydrogen layer of suitable chemical composition ("burnished").
So far, however, it was believed to have to do without the burnishing and similar oxidation processes in the treatment of such machine parts that are exposed to sliding friction under the conditions occurring during the operation of internal combustion engines. For example, it has been warned against treating piston rings of this type, because otherwise the wear process and the running properties will be adversely affected.
It has now been found by Dipl. Ing. A. Moser and E. Vetter that, in contrast to this, a reduction in wear and an improvement in the running properties of piston pins for internal combustion engine pistons can be achieved by dipping the pins in strongly alkaline solutions, e.g. B. in hot concentrated sodium hydroxide solution, be browned.
Comparative tests have shown, for example, that after 185 hours of operation the wear of piston pins with a dip-burnished surface was on average not even half as great as that of untreated pins that had been used for just as long under otherwise identical conditions.
Since the burnishing of the mass of the treated bolts practically does not change, a special after-treatment is not necessary. Furthermore, the previously necessary greasing, wrapping in oil paper and removing the layer of fat used as rust protection, which is not only very time-consuming, but also consumes large quantities of valuable raw materials, is saved before installation.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE229277X | 1941-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH229277A true CH229277A (en) | 1943-10-15 |
Family
ID=5867691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH229277D CH229277A (en) | 1941-08-01 | 1942-06-08 | Process for reducing wear and improving the running properties of piston pins for internal combustion engine pistons. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH229277A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2579752A (en) * | 1950-03-11 | 1951-12-25 | Newell Isaac Laird | Process for blackening iron and steel and composition of matter therefor |
-
1942
- 1942-06-08 CH CH229277D patent/CH229277A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2579752A (en) * | 1950-03-11 | 1951-12-25 | Newell Isaac Laird | Process for blackening iron and steel and composition of matter therefor |
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