Method for producing a piston
AssigneeMahle International GmbH
InventorsSebastian Mangold, Benjamin Schmieder
Life of this patent
Estimating the term…
Abstract
A method for producing a piston for an internal combustion engine may include producing a piston upper part including a piston top, at least parts of a ring section, and at least part of a cooling channel, producing a piston lower part and closing the part of the cooling channel arranged in the piston upper part via an additive method, and finish-machining the piston. Finish-machining the piston may include producing at least one annular groove in a ring support for receiving a piston ring.
Claims19
A method for producing a piston for an internal combustion engine, the method comprising:
- producing a piston upper part including a piston top, at least part of a ring section, and at least part of a cooling channel;
- producing a piston lower part and closing the part of the cooling channel arranged in the piston upper part via an additive method;
- prior to producing the piston lower part via the additive method, producing a flat joining surface on the piston upper part via facing the piston upper part at least on a side facing the piston lower part;
- finish-machining the piston;
- and
- wherein finish-machining the piston includes producing at least one annular groove in a ring support for receiving a piston ring.
A method for producing a piston for an internal combustion engine, the method comprising:
- producing a piston upper part via at least one of forging and casting, the piston upper part including a piston top, at least part of a ring section, and at least part of a cooling channel;
- at least partially closing the part of the cooling channel arranged in the piston upper part via producing a piston lower part on the piston upper part via an additive method;
- and
- producing at least one annular groove in a ring support embedded in the piston upper part, the at least one annular groove configured to receive a piston ring;
- wherein producing the piston upper part includes at least one of forging and casting the ring support into the piston upper part;
- wherein the ring support is composed of a first material;
- wherein the piston upper part is composed of a second material that is different than the first material;
- and
- wherein the ring support forms the annular groove.
A method for producing a piston for an internal combustion engine, the method comprising:
- producing a piston upper part, the piston upper part including a piston top, at least part of a ring section, and an upper portion of a cooling channel;
- producing a piston lower part on the piston upper part via an additive method;
- and
- producing at least one annular groove in a ring support embedded in the piston upper part, the at least one annular groove configured to receive a piston ring;
- wherein producing the piston lower part on the piston upper part via an additive method includes:
- applying a layer of metal powder on a surface of the piston upper part;
- locally melting the layer of metal powder;
- allowing the layer of melted metal powder to solidify and form a solid material layer;
- producing a plurality of additional solid material layers on the solid material layer to form the piston lower part;
- and
- forming a lower portion of the cooling channel with at least one of the solid material layer and at least a subset of the plurality of additional solid material layers;
- wherein the lower portion of the cooling channel has a rougher surface than the upper portion of the cooling channel;
- and
- wherein the rougher surface of the lower portion of the cooling channel is produced via the additive method.
Dependencies are inferred from the claim text.