US 7,458,880 B2
Method for grinding of cam profiles
Oliver Fritz, Aichtal (Germany); Rolf Kirschner, Esslingen (Germany); Roland Schacherer, Geisingen (Germany); and Falk Schneider, Korntal-Münchingen (Germany)
Assigned to MAHLE International GmbH, Stuttgart (Germany)
Filed on May 11, 2007, as Appl. No. 11/803,110.
Claims priority of application No. 10 2006 022 405 (DE), filed on May 13, 2006; and application No. 10 2006 044 010 (DE), filed on Sep. 19, 2006.
Prior Publication US 2007/0264913 A1, Nov. 15, 2007
Int. Cl. B24B 1/00 (2006.01)
U.S. Cl. 451—49  [451/54; 451/55; 451/62; 451/249; 451/251] 7 Claims
OG exemplary drawing
 
1. A method for grinding of cam profiles on a camshaft (1), which camshaft (1)
has an inner shaft (5) and an outer shaft (4) arranged coaxially one inside the other and mounted with respect to one another,
has first cams (2) and second cams (3) that can rotate with respect to one another about the camshaft axis (6) over a limited circumferential angle, the first cams (2) being fixedly connected to the inner shaft (5) and the second cams (3) being fixedly connected to the outer shaft (4),
wherein during the grinding process and/or thereafter, the method includes: forcing fluid under pressure into the outer shaft (4), thereby forcing fluid into a ring space (15) between the inner shaft (5) and outer shaft (4), wherein the fluid flows through a longitudinal hole (13) and into a ring gap (8) between the first cam (2) and the outer shaft (4) thereby preventing grinding dust from penetrating into the ring gap (8) or flushing out any grinding dust that has already penetrated into the ring gap (8).