GB1485696A - Cutting tools - Google Patents

Abstract

1485696 Milling cutters; cutting tools; boring head VALERON CORP 7 Feb 1975 [11 Feb 1974] 5256/75 Headings B3K B3B and B3C A cutting tool, e.g. for turning, boring or milling, comprises a body, e.g. an annular body 10, at least one recess for receiving an indexable polygonal insert 24 and comprising a pair of insert locating surfaces 18, 20, at least one slot 14 formed respectively in the body adjacent the recess and comprising a third seating surface 36, at least one anvil 22 to which the insert 24 is secured and which is received respectively in the or each of the slots 14 and seated on said third surface 36, and locking means 58 for simultaneously retaining the anvil 22 in the slot 14 and the insert 24 in its recess, against the said surfaces 18, 20, 36. The locking means 58 has a conical end 60 which engages an offset conical depression in the anvil to draw it axially and radially inwards in a line of action which is oblique to the said surfaces 18, 20 and 36. An extension 46 in the anvil causes it to rotate to hold the insert sides against the seating surfaces 18, 20. The said seating surfaces may be formed as individual pockets or as continuous surfaces of revolution around the annular body (Figs. 4-8, not shown). On the these surfaces of revolution may be convex to provide a point contact with the insert. This convex surface is used with lighter cutting forces so that, depending on which surface 18, 20 is convex, the cutting tool may be used for rough milling and finish boring, or for rough boring and finish milling. The inserts 24 may be set for positive or negative rake cutting depending on the configuration of the surfaces 18, 20 and slot 14.