Tool assembly configured for Swiss machining
A grooving or part-off tool assembly for Swiss-style machining includes a holder. The holder includes a resilient normally-closed holder clamp. In a preferred embodiment the holder clamp biases a blade holding a cutting insert against a pocket side abutment surface of a holder pocket.
1 . A holder comprising:
opposing holder first and second sides defining a first side direction from the holder second side towards the holder first side, and a second side direction opposite to the first side direction;
opposing holder front and rear ends defining a forward direction from the holder rear end towards the holder front end, and a rearward direction opposite to the forward direction side direction;
opposing holder top and bottom sides defining an upward direction from the holder bottom side towards the holder top side, and a downward direction opposite to the upward direction;
a holder pocket located at an intersection of the holder first side, holder front end and holder top side, the holder pocket comprising:
a pocket side abutment surface extending along the holder first side and facing the first side direction;
a pocket bottom abutment surface located downward of the pocket side abutment surface and facing the upward direction; and
a pocket rear abutment surface located rearward of the pocket side abutment surface and facing the forward direction; and
a holder clamp located at the holder top side, the holder clamp extending over the pocket side abutment surface and comprising:
a resilient hinge portion;
a clamp portion comprising a clamp top abutment surface facing in the downward direction; and
an intermediary portion extending from the resilient hinge portion to the clamp portion;
wherein:
the resilient hinge portion being normally-closed such that the resilient hinge portion is configured to resiliently bias the clamp portion downwardly.
2 . The holder according to claim 1 , wherein:
the pocket bottom abutment surface also faces the second side direction and hence is inwardly slanted to face the upward and second side direction; and
the clamp top abutment surface also faces the second side direction and hence is inwardly slanted to face the downward and second side directions.
3 . The holder according to claim 1 , wherein the holder further comprises a holder guide hole opening out to the pocket side abutment surface.
4 . The holder according to claim 3 , wherein the holder guide hole comprises a constricted portion.
5 . The holder according to claim 4 , wherein the holder guide hole is hourglass shaped.
6 . The holder according to claim 1 , wherein the holder comprises an elongated shank portion and a head portion extending forward of the shank portion, the holder pocket being at least partially formed on the head portion at the holder first side.
7 . The holder according to claim 6 , wherein the holder pocket extends rearward of the head portion.
8 . The holder according to claim 6 , wherein, in a front view of the holder, the shank portion has a profile and the only portion of the holder that extends outside the shank portion's profile extends in the upward direction.