CH230566A - Process for the production of forged pistons for internal combustion engines. - Google Patents
Process for the production of forged pistons for internal combustion engines.Info
- Publication number
- CH230566A CH230566A CH230566DA CH230566A CH 230566 A CH230566 A CH 230566A CH 230566D A CH230566D A CH 230566DA CH 230566 A CH230566 A CH 230566A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- internal combustion
- annular
- combustion engines
- forged pistons
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
- B21K1/185—Making machine elements pistons or plungers with cooling channels
-
- 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
- B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Verfahren zur Herstellung von geschmiedeten Kolben für Brennkraftmaschinen. Die Erfindung betrifft ein Verfahren zur Herstellung von geschmiedeten Kolben für Brennkraftmaschinen mit hinter den Ring nuten liegenden, den Wärmefluss zu den Rin gen hemmenden Ringräumen.
Derartige Hohlräume sind an sich be kannt, konnten aber bisher an einstückigen Kolben nicht in wirtschaftlicher Weise an gebracht werden, wenn man sich nicht darauf beschränken wollte, sie einfach vom Kolben Boden aus einzustechen, wodurch jedoch die wärmeaufnehmende Oberfläche des Kolbens vergrössert und damit eine wirksame Vermin derung des Wärmeflusses verhindert wird.
Es ist zwar bekannt, an geschmiedeten Bauteilen vorgesehene Hohlräume durch Ein pressen am halbfertigen Werkstück beson ders angeordneter Randteile zu bilden; dabei musste jedoch der völlige Abschluss durch Verschweissen erfolgen, was nicht nur um ständlich ist, sondern auch Anlass zu uner wünschten Verformungen gibt und in vielen Fällen, insbesondere bei Gegenständen aus Leichtmetall, die Festigkeit herabsetzt.
Gemäss der Erfindung sollen geschmiedete Kolben mit hinter den Ringnuten liegenden, den Wärmefluss zu den Ringen hemmenden Ringräumen in einfacher und wirtschaft licher Weise dadurch geschaffen werden, dass eine Ringnut von einer den Boden am Rand überhöhenden Wandverstärkung aus einge stochen und der stehenbleibende kegelmantel- förmige Bodenteil gegen den stehenbleiben den ringförmigen Schaftteil eingebogen wird, um die Öffnung der Ringnut gegen den Ver- brennungsraum abzuschliessen.
Gegebenen falls können vor dem Einbiegen des Boden teils Einlagen aus Werkstoffen mit schlechter Wärmeleitfähigkeit in die Nut eingebracht werden, oder es können die Flächen der Nut, welche nach dem Fertigpressen die Wandun gen des Hohlraumes bilden, vor dem Ein pressen des Bodenteils einer die Wärmeleit fähigkeit herabsetzenden Oberflächenbehand lung, zum Beispiel anodischer Oxydation, ausgesetzt werden.
In der Zeichnung ist zur näheren Erläu terung eines beispielsweisen Verfahrens ein Kolbenrohling in verschiedenen Bearbeitungs stufen schematisch dargestellt.
Fig. 1 zeigt einen vorgepressten Rohling, dessen Boden 1 am Rande eine über den Boden vorstehende Verstärkung aufweist.
In Fig. 2 ist gezeigt, wie die einen kegel- mantelförmigen Bodenteil ? und einen ring förmigen Schaftteil 3 stehenlassende Nut 4 eingestochen wird.
Fig. 3 zeigt den Rohling, nachdem der Bodenteil 2 gegen den Schaftteil 3 einge bogen wurde, so dass die Nut 4 zum Teil ge schlossen ist und hinter den nicht dargestell ten Ringnuten ein abgeschlossener Hohlraum gebildet wird.
Das Verfahren soll nicht auf die Herstel lung von Ringräumen gemäss dem gezeich neten Beispiel beschränkt sein, sondern es können auch anders geformte Hohlräume, zum Beispiel nach dem Schaft des Kolbens hin offene Räume von L-förmigem Quer schnitt oder dergleichen erzielt werden.
Process for the production of forged pistons for internal combustion engines. The invention relates to a method for the production of forged pistons for internal combustion engines with grooves behind the ring, the heat flow to the Rin gene inhibiting annular spaces.
Such cavities are known per se, but could not be brought to one-piece piston in an economical manner if you did not want to limit yourself to simply piercing them from the piston bottom, which, however, increases the heat-absorbing surface of the piston and thus an effective one Reduction of the heat flow is prevented.
Although it is known to form cavities provided on forged components by a press on the semi-finished workpiece FITS arranged edge parts; However, the complete closure had to be done by welding, which is not only cumbersome, but also gives rise to undesirable deformations and in many cases, especially with objects made of light metal, reduces the strength.
According to the invention, forged pistons with annular spaces behind the annular grooves that inhibit the flow of heat to the rings are created in a simple and economical way by piercing an annular groove from a wall reinforcement that rises above the base at the edge and the remaining cone-shaped base part against which the annular shaft part is bent in order to close the opening of the annular groove against the combustion chamber.
If necessary, inserts made of materials with poor thermal conductivity can be introduced into the groove before the bottom part is bent in, or the surfaces of the groove which form the walls of the cavity after the final pressing can have a thermal conductivity before the bottom part is pressed in degrading surface treatment, e.g. anodic oxidation.
In the drawing, a piston blank is shown schematically in various processing stages for a more detailed explanation of an exemplary method.
1 shows a pre-pressed blank, the bottom 1 of which has a reinforcement protruding above the bottom at the edge.
In Fig. 2 it is shown how a conical shell-shaped bottom part? and a ring-shaped shaft part 3 standing groove 4 is pierced.
Fig. 3 shows the blank after the bottom part 2 has been bent against the shaft part 3, so that the groove 4 is partly closed and a closed cavity is formed behind the annular grooves not dargestell th.
The method should not be limited to the produc- tion of annular spaces according to the example shown, but differently shaped cavities, for example after the shaft of the piston open spaces of L-shaped cross-section or the like can be achieved.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE230566X | 1942-03-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH230566A true CH230566A (en) | 1944-01-15 |
Family
ID=5871041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH230566D CH230566A (en) | 1942-03-24 | 1943-01-18 | Process for the production of forged pistons for internal combustion engines. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH230566A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1033954B (en) * | 1955-08-18 | 1958-07-10 | Maschf Augsburg Nuernberg Ag | Cooled light alloy piston |
DE1064751B (en) * | 1958-03-07 | 1959-09-03 | Schmidt Gmbh Karl | Light metal pistons, in particular a forged or pressed version, with ring channels in the piston head that serve to hold coolants |
DE1210302B (en) * | 1959-12-02 | 1966-02-03 | Karl Schmidt Ges Mit Beschraen | Method of manufacturing pistons with a coolant space in the piston crown |
EP1452250A2 (en) * | 2003-03-01 | 2004-09-01 | KS Kolbenschmidt GmbH | Method of manufacturing a cooling duct piston with deformable flange |
EP1611975A1 (en) * | 2004-06-30 | 2006-01-04 | KS Kolbenschmidt GmbH | Method of manufacturing a piston with a cooling channel for an internal combustion engine |
JP2006022957A (en) * | 2004-07-07 | 2006-01-26 | Yuejun Huang | One-piece steel piston |
WO2006063710A1 (en) * | 2004-12-16 | 2006-06-22 | Cdp Bharat Forge Gmbh | Method for producing rotationally symmetrical, undercut contours |
DE102005021428A1 (en) * | 2005-05-10 | 2006-11-16 | Mahle International Gmbh | Process to manufacture a forged piston by formation of a collar and folding over cooling channel |
WO2008003401A1 (en) * | 2006-07-07 | 2008-01-10 | Ks Kolbenschmidt Gmbh | Cooling channel piston for an internal combustion engine and method for the production thereof |
US8011288B2 (en) | 2005-09-17 | 2011-09-06 | Ks Kolbenschmidt Gmbh | Piston, especially cooling channel piston, comprising three friction-welded zones |
DE102012224231A1 (en) * | 2012-12-21 | 2014-06-26 | Ks Kolbenschmidt Gmbh | Method for producing a piston and associated piston |
DE102008046115B4 (en) * | 2007-09-18 | 2016-12-22 | Art Metal Mfg. Co., Ltd. | Method for producing a piston for an internal combustion engine |
US11162453B2 (en) | 2016-05-04 | 2021-11-02 | Ks Kolbenschmidt Gmbh | Piston |
-
1943
- 1943-01-18 CH CH230566D patent/CH230566A/en unknown
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1033954B (en) * | 1955-08-18 | 1958-07-10 | Maschf Augsburg Nuernberg Ag | Cooled light alloy piston |
DE1064751B (en) * | 1958-03-07 | 1959-09-03 | Schmidt Gmbh Karl | Light metal pistons, in particular a forged or pressed version, with ring channels in the piston head that serve to hold coolants |
DE1210302B (en) * | 1959-12-02 | 1966-02-03 | Karl Schmidt Ges Mit Beschraen | Method of manufacturing pistons with a coolant space in the piston crown |
EP1452250A2 (en) * | 2003-03-01 | 2004-09-01 | KS Kolbenschmidt GmbH | Method of manufacturing a cooling duct piston with deformable flange |
EP1452250A3 (en) * | 2003-03-01 | 2005-09-21 | KS Kolbenschmidt GmbH | Method of manufacturing a cooling duct piston with deformable flange |
EP1611975A1 (en) * | 2004-06-30 | 2006-01-04 | KS Kolbenschmidt GmbH | Method of manufacturing a piston with a cooling channel for an internal combustion engine |
DE102004031513A1 (en) * | 2004-06-30 | 2006-01-26 | Ks Kolbenschmidt Gmbh | Method for producing a cooling channel piston for an internal combustion engine |
EP1614885A3 (en) * | 2004-07-07 | 2009-08-12 | Inc. Karl Schmidt Unisia | One-piece steel piston |
JP2006022957A (en) * | 2004-07-07 | 2006-01-26 | Yuejun Huang | One-piece steel piston |
US8082839B2 (en) | 2004-07-07 | 2011-12-27 | Karl Schmidt Unisia, Inc. | One-piece steel piston |
WO2006063710A1 (en) * | 2004-12-16 | 2006-06-22 | Cdp Bharat Forge Gmbh | Method for producing rotationally symmetrical, undercut contours |
CN100475383C (en) * | 2004-12-16 | 2009-04-08 | Cdp印地冶炼厂有限责任公司 | Method for producing rotationally symmetrical undercut contours |
DE102005021428A1 (en) * | 2005-05-10 | 2006-11-16 | Mahle International Gmbh | Process to manufacture a forged piston by formation of a collar and folding over cooling channel |
US8011288B2 (en) | 2005-09-17 | 2011-09-06 | Ks Kolbenschmidt Gmbh | Piston, especially cooling channel piston, comprising three friction-welded zones |
WO2008003401A1 (en) * | 2006-07-07 | 2008-01-10 | Ks Kolbenschmidt Gmbh | Cooling channel piston for an internal combustion engine and method for the production thereof |
US8485088B2 (en) | 2006-07-07 | 2013-07-16 | Ks Kolbenschmidt Gmbh | Cooling channel piston for an internal combustion engine and method for the production thereof |
DE102008046115B4 (en) * | 2007-09-18 | 2016-12-22 | Art Metal Mfg. Co., Ltd. | Method for producing a piston for an internal combustion engine |
DE102012224231A1 (en) * | 2012-12-21 | 2014-06-26 | Ks Kolbenschmidt Gmbh | Method for producing a piston and associated piston |
US11162453B2 (en) | 2016-05-04 | 2021-11-02 | Ks Kolbenschmidt Gmbh | Piston |
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