PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR PRODUCING SAME

The invention relates to a method for producing a piston (10) for an internal combustion engine, said piston comprising a main piston body (11) and a piston ring element (12), the main piston body (11) having at least a piston skirt (15), the piston ring element having at least a piston head (19), a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SCHARP, Rainer, SEIFRIED, Matthias
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING COMBUSTION ENGINES CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing a piston (10) for an internal combustion engine, said piston comprising a main piston body (11) and a piston ring element (12), the main piston body (11) having at least a piston skirt (15), the piston ring element having at least a piston head (19), a circumferential fire land (21), and a circumferential ring part (22) provided with annular grooves, and the main piston body (11) and the piston ring element (12) forming a circumferential closed cooling channel (23). Said method is characterized by the following steps: (a) providing a blank (11', 111', 211') of a main piston body (11) having an outer joining surface (29, 129, 229) and an inner joining surface (31, 131, 231) and a lower cooling channel part (23a) circulating between the two joining surfaces (29, 31; 129, 131; 229, 231), (b) providing a blank (12', 112', 212') of a piston ring element (12) having an outer joining surface (32, 132, 232) and an inner joining surface (33, 133, 233) and an upper cooling channel part (23b) circulating between the two joining surfaces (32, 33; 132, 133; 232, 233), (c) forming a circumferential expansion (34a, 34b; 134b; 234a, 234b) on at least one joining surface (29, 129, 229, 31, 131, 231; 32, 132, 232, 33, 133, 233), the expansion (34a, 34b; 134b; 234a, 234b) extending to the associated cooling channel part (23a; 23b), (d) connecting the blank (11', 111', 211') of the main piston body (11) to the blank (12', 112', 212') of the piston ring element (12) by means of the joining surfaces (29, 129, 229, 31, 131, 231; 32, 132, 232, 33, 133, 233) thereof using friction welding to form a piston blank (10', 110'), (e) post-processing and/or finishing the piston blank (10', 110') to form a piston (10). The invention further relates to such a piston.