Trough edge rounding producing process involves separately machining second trough edge rounding deeper into trough

摘要

The trough edge rounding producing process is for the piston of a direct-injection diesel with valve recess base surface at an angle to the plane of the piston head. The trough edge regions (V) are rounded opposite the valve recesses by a machining process. A second trough edge rounding is produced deeper into the trough by a separate machining process.