摘要:
A twist drill assembly (10) comprising a shaft (30) and a drill tip (20); the shaft having a single internal shaft conduit (34) for a fluid, extending between orifices (36, 37) formed into the shaft; the drill tip having an internal drill tip conduit (22) for the fluid, extending between orifices formed into the drill tip; the shaft and the drill tip configured such that the drill tip is connectable to an end of the shaft with the internal drill tip conduit in communication with the internal shaft conduit, allowing the fluid to be capable of flowing from the internal shaft conduit into the internal drill tip conduit; the internal shaft conduit having a spiral form aligned with a central longitudinal axis of the shaft, and configured to complement the arrangement of spiral flutes (38) formed on the shaft.
摘要:
A twist drill assembly (10) comprising a shaft (30) and a drill tip (20); the shaft having a single internal shaft conduit (34) for a fluid, extending between orifices (36, 37) formed into the shaft; the drill tip having an internal drill tip conduit (22) for the fluid, extending between orifices formed into the drill tip; the shaft and the drill tip configured such that the drill tip is connectable to an end of the shaft with the internal drill tip conduit in communication with the internal shaft conduit, allowing the fluid to be capable of flowing from the internal shaft conduit into the internal drill tip conduit; the internal shaft conduit having a spiral form aligned with a central longitudinal axis of the shaft, and configured to complement the arrangement of spiral flutes (38) formed on the shaft.
摘要:
A method of making a cutter structure comprising super-hard material defining a rake face topology is provided. The method includes providing a pre-sinter assembly comprising a substrate body having a formation surface defining a topology complementary to the rake face topology, and an aggregation comprising a plurality of super-hard grains, the aggregation disposed adjacent the formation surface of the substrate body, the substrate body comprising a source of catalyst or binder material capable of promoting the sintering of the super-hard grains at a pressure and temperature at which the super-hard material is thermodynamically stable; subjecting the pre-sinter assembly to the pressure and temperature to provide a sintered polycrystalline super-hard structure joined to the formation surface of the substrate body at a first major boundary of the super-hard structure and having a second major boundary surface opposite the formation surface; removing the substrate body to expose the first major boundary of the super-hard structure defining the rake face topology. Cutter inserts and machine tools are also provided.
摘要:
A cutter element (100) for a rotary machine tool having an axis of rotation, the cutter element comprising a plurality of cutting edges (110) defined by at least one cutter structure (120) comprising superhard material, consecutive cutting edges being spaced apart by at most 10 mm and configured operable to cut a body when moved in a direction that is substantially non-aligned with the axis of rotation.
摘要:
A cutter element (100) for a rotary machine tool having an axis of rotation, the cutter element comprising a plurality of cutting edges (110) defined by at least one cutter structure (120) comprising superhard material, consecutive cutting edges being spaced apart by at most 10 mm and configured operable to cut a body when moved in a direction that is substantially non-aligned with the axis of rotation.
摘要:
A cutting insert incorporates a pre-formed discrete cutting tip which wraps around a curved cutting corner of the insert. The cutting tip includes a top layer and a bottom layer made of a relatively harder material than the top layer. In one embodiment, the bottom layer is made of polycrystalline diamond (PCD) or a polycrystalline cubic boron nitride (CBN) material and the top layer is made of cemented carbide. The cutting insert may further incorporate a chip control structure formed in the cutting tip including a plurality of facets formed on each side of a centerline for providing chip control during a cutting operation. The chip control structure can be formed in a two-step process to expose a portion of the bottom layer. The discrete cutting tip can be brazed to the cutting insert prior to forming the chip control structure.
摘要:
The disclosure relates to bonded assemblies (89) and a method of manufacture of such bonded assemblies (89). A such bonded assembly (89) has low residual stress and includes an inner body (91) having a substantially conical form, an outer body (90) having a substantially conical recess and a bonding region; whereby the conical form is in a first material having a thermal expansion coefficient al and the conical recess is in a second material having a thermal expansion coefficient a2 whereby al is not equal to a2; whereby said conical form includes an axis (31) extending in an axial direction and is substantially concentric with said conical recess; said bonding region including at least a third material having a plurality of grains and with an alignment of said grains relative to the generatrices of said conical form and said conical recess; said related method including an axial displacement of said inner body (91) relative to said outer body (90) simultaneous with cooling of said bonded assembly (89) from an elevated temperature to a low or ambient temperature.
摘要:
A method of making a cutter structure comprising super-hard material defining a rake face topology is provided. The method includes providing a pre-sinter assembly comprising a substrate body having a formation surface defining a topology complementary to the rake face topology, and an aggregation comprising a plurality of super-hard grains, the aggregation disposed adjacent the formation surface of the substrate body, the substrate body comprising a source of catalyst or binder material capable of promoting the sintering of the super-hard grains at a pressure and temperature at which the super-hard material is thermodynamically stable; subjecting the pre-sinter assembly to the pressure and temperature to provide a sintered polycrystalline super-hard structure joined to the formation surface of the substrate body at a first major boundary of the super-hard structure and having a second major boundary surface opposite the formation surface; removing the substrate body to expose the first major boundary of the super-hard structure defining the rake face topology. Cutter inserts and machine tools are also provided.