Patent ID: 7987831
Filing Date: 2011-08-02
Classification: B23B,B23P,F02F,Y10T

Abstract:
1. Method for the production of a one-part piston ( 20 ) for an internal combustion engine, from a piston blank ( 10 ), having a cooling channel ( 15 ) that runs in ring shape on the circumference of a piston head ( 11 ), and is open towards the bottom, and a ring-shaped recess ( 16 ) configured between the piston head ( 11 ) and a piston skirt ( 13 ), whereby the piston head ( 11 ) and the piston skirt ( 13 ) are connected with one another by means of pin bosses ( 14 ), and whereby the ring-shaped recess ( 16 ) and the cooling channel ( 15 ) are worked into the piston blank ( 10 ) by means of cutting machining, and subsequently, the outer contour is finished and the cooling channel is closed off, wherein for cutting machining of the cooling channel ( 15 ), a tool ( 17 ) is moved into the region of the cooling channel ( 15 ), while the piston is rotating, in an arc-shaped pivoting movement (A), through the recess ( 16 ), and the cooling channel ( 15 ) is machined out.