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Piston manufacturing method for internal combustion engine, involves machining surface of piston lower part after separating piston upper part from piston lower part and before welding piston upper part with piston lower part
Piston manufacturing method for internal combustion engine, involves machining surface of piston lower part after separating piston upper part from piston lower part and before welding piston upper part with piston lower part
The method involves inserting bolt boreholes (14) into areas provided for bolt-studs (11) after forging a piston blank (1) and before separating a piston upper part (5) from a piston lower part (6). A finished shape of a lower side of the upper part is provided to an upper side (2) of the piston blank by a machining process. A surface of the lower part is provided at a side of a piston base and machined after separating the upper part from the lower part and before welding the upper part with the lower part.
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