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Method, production line, and piston blank used for the production of a monolithic piston for combustion engines, and piston for combustion engines
Method, production line, and piston blank used for the production of a monolithic piston for combustion engines, and piston for combustion engines
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机译:用于制造用于内燃机的整体式活塞的方法,生产线和活塞坯以及用于内燃机的活塞
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摘要
A method and a manufacturing line allow for the manufacture of piston blanks of dimensions close to the final dimensions, which in the course of subsequent finish-machining need only be machined with removal of material to a small degree. A piston shaft of the piston blank is produced by backward extrusion. At least one hollow throat element is already produced at the piston blank by an upset-forging operation. For this purpose, a special forging tool is provided, which, after the manufacture of the piston shaft, takes effect on the piston blank in such a way that at least one hollow throat element is formed at the latest at subsequent forming of the piston base. In this way, a perceptible reduction is achieved in the weight of a piston in relation to conventionally manufactured forging pistons.
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