Anti-rotation mounting mechanism for a round insert

摘要

An anti-rotation mounting mechanism is provided between an indexable insert and an insert-receiving pocket in the body of a machine tool, such as a milling cutter. The mechanism includes a plurality of curved stop surfaces uniformly disposed around the side surface of the insert, a portion of which is obliquely oriented with respect to the side surface of the insert, and an anti-rotation feature in the pocket of the tool body having a pair of engagement portions that are substantially complementary in shape to that of the stop surfaces for forming an interference joint between the pocket and the insert. The anti-rotation feature further includes a central planar portion that does not engage the stop surfaces. The mechanism effectively prevents rotation between the insert and pocket without the formation of point-type, localized stresses which can chip or break the insert.

主权项

1. An anti-rotation mounting mechanism between a round cutting insert and an insert-receiving pocket of a tool body, said insert including an upper surface that terminates in a cutting edge, a lower surface, and a side surface between said upper and lower surfaces, the mechanism comprising:
a plurality of curved stop surfaces disposed around the side surface of the cutting insert; and an anti-rotation surface on the insert-receiving pocket of the tool body for engaging the stop surfaces to form an interference joint, the anti-rotation surface including a pair of curved engagement portions separated by a planar central portion, wherein the pair of curved engagement portions engage the curved stop surfaces of the cutting insert when the cutting insert is mounted in the insert-receiving pocket, and wherein the planar central portion does not engage the curved stop surfaces of the cutting insert when the cutting insert is mounted in the insert-receiving pocket, and wherein the planar central portion allows the anti-rotation surface of the pocket to move radially inward with respect to the cutting insert, resulting in an arc length of rotation to be shortened, thereby allowing an amount of clocking of the cutting insert to be selectively adjusted when the cutting insert is mounted in the insert-receiving pocket.