摘要:
An adjustable cartridge to be mounted in a boring bar (10), the cartridge Including an anvil (24,28) rotatably affixed to said boring bar, said anvil including a pocket into which a laydown indexable insert (32) is affixed. The anvil is secured in an axially oriented slot (27) which includes an arcuate seating face (26). Means (46,47,51) for adjusting said cartridge in said boring bar along said adjustment path; and means (17,60) for preloading said anvil in said slot towards said adjustment means, are also provided, wherein said preloading means comprises a screw (58) which is threadably retained in said body proximally to said anvil and a leaf spring (60) which is retained in place by the screw and engages said anvil on a second recessed area (42) of said anvil. Rotation of the anvil within the slot effects radial adjustment of the insert.
摘要:
A fully indexable negative geometry polygonal insert uses an active cutting edge extending in a first direction from each corner of the polygon downwardly from an associated major polygonal surface of the insert along with a wiping or finishing cutting edge lying substantially in the plane of the associated major surface and extending in a second direction from the insert corner. The geometry of the cutting edge enables mounting of the insert to a milling cutter with negative axial rake, such that the cutting edge is substantially parallel to an axis of rotation of the cutting tool.
摘要:
An indexable cutting insert (10) having a polycrystalline cutting edge (20) along the entire periphery of the insert, comprising a top surface (12), a bottom surface (14) and a side wall (16) extending unbroken therebetween to form a body, said body comprised of a composite wafer of cemented carbide, polycrystalline material and cemented carbide material, a cutting edge formed of polycrystalline material, and a chip breaker (22) rearward of the cutting edge, said chip breaker formed by removal of a portion of cemented carbide from the at least one of the top or bottom surface of the insert at the junction of the sidewall and the top or bottom surface.
摘要:
An insert (18) having a cutting segment (20) of a polycrystalline diamond or cubic boron (37) wafered between two layers of a hard metal carbide (42) is bonded into a pocket in a standard insert and machined to form a chip breaker (44) having a clearance surface and expose the cutting edge (46) of polycrystalline material integral with the cutting segment.
摘要:
A fully indexable negative geometry polygonal insert uses an active cutting edge extending in a first direction from each corner of the polygon downwardly from an associated major polygonal surface of the insert along with a wiping or finishing cutting edge lying substantially in the plane of the associated major surface and extending in a second direction from the insert corner. The geometry of the cutting edge enables mounting of the insert to a milling cutter with negative axial rake, such that the cutting edge is substantially parallel to an axis of rotation of the cutting tool.
摘要:
A machine tool that includes a rotary spindle (10) having a radially movable cutter element (12). An axially movable drawbar (17) within the spindle (10) is used to move the cutter element to its retracted or extended position. A harmonic drive unit is carried on the spindle for imparting rotary movement to a cam element that has a driving connection with the drawbar (17). The harmonic drive unit can be controlled through a remotely-operated brake (33) that is adapted to be selectively engaged with a reaction member that forms part of the harmonic drive unit.