Abstract:
A cutting tool assembly is disclosed which comprises a cutting head having a flat coupling face provided with a multilateral recess, a shank having a flat coupling face provided with a multilateral recess corresponding to that of the cutting head, and a multilateral coupling plate fit complementarily into the interior space created by both of the multilateral recesses. The cutting tool assembly in accordance with this disclosure provides a more stable coupling structure, since rotational torque is transmitted through the multilateral coupling plate from the shank to the cutting head, whereas in the prior art coupling screws are used to directly bear the torque force.
Abstract:
A clamp assembly for fastening a cutting insert to a tool holder is disclosed herein. The clamp assembly comprises: a body portion provided with a screw hole, a forward protrusion formed at the front portion of the body and extending downward, a rear protrusion formed at the rear end portion of the body and extending downward, and a bridge connecting the forward protrusion and the central portion of the body; and a pressing plate comprising upper and lower surfaces, a front nose portion, a rear end portion, and is provided with a keyhole shaped groove having an enlarged inner cavity open toward the rear end by a narrow neck extending thicknesswise. The forward protrusion is inserted into the enlarged inner cavity and the bridge is inserted into the narrow neck of the keyhole groove so that the pressing plate is coupled to the clamp.
Abstract:
The present invention relates to a cutting tool capable of both drilling and internal/external turning. The cutting tool comprises a generally triangular-shaped cutting insert and a tool holder. On each side, the triangular-shaped cutting insert forms a major cutting edge and a minor cutting edge, which is shorter than said major cutting edge. Two adjacent major cutting edges form an angle of 60° therebetween, while adjacent major and minor cutting edges intersecting at a corner of the triangular shape of the cutting insert form an angle of 80 to 89° therebetween. The cutting insert is mounted in a pocket so that one of the major cutting edges of the cutting insert is projected in an axially forward direction of the tool holder, while the minor cutting edge on the side adjacent to the projected major cutting edge is projected in a radially outward direction of the tool holder.
Abstract:
The present invention relates to an apparatus for clamping a cutting insert to a tool holder. The present invention comprises a tool holder, comprising: a cutting insert pocket and a mounting bore; a clamp lever comprising a clamp portion and a lever portion placed in the mounting bore; and a fixing screw. The fixing screw is fastened through a hole which extends downwardly from a side wall of the tool holder to the mounting bore. One end of the fixing screw further comprises a pressure-applying surface substantially perpendicular to the rotational axis of the fixing screw, and the side surface of the lever portion of the clamp lever comprises an inclined surface which makes contact with the pressure-applying surface of the fixing screw. According to the clamping apparatus of the present invention, the cutting insert can be firmly clamped to the tool holder.
Abstract:
Tool holder assembly (TH) for multifunctional machining, such as drilling, boring, facing, and turning, eliminate interference between facing and turning, and secure an adequate chip groove space (10) for discharging chips therethrough without deterioration of a rigidity of the tool holder (TH), thereby securing a good quality of machining, and an exclusive adapter (TA) suitable to the foregoing tool holder (TH) assembly for multifunctional machining.
Abstract:
A hexahedral-shaped cutting insert is disclosed which has an upper surface, a lower surface, a plurality of side surfaces connecting the upper surface and the lower surface and a central hole passing through the upper and lower surfaces. The lower surface has a flat mounting surface, and the upper surface is curved concavely over the whole area thereof and provided with cutting edges along the borderline to the side surfaces, and corner cutting edge portions formed at borders of two adjacent cutting edges. The cutting edges are formed such that the height is largest at corner cutting edge portions and smallest in the middle portions. A land portion, a downward inclined surface, a bottom surface, and a seating surface portion are formed from the cutting edges inwards on the upper surface. A plurality of semispherical protrusions are formed on border portions between the downward inclined surface and the bottom surface, and at least one corner cutting edge portion has a corner bottom surface surrounded by an arc belt protrusion which connects two adjacent semispherical protrusions.
Abstract:
The present invention discloses a cutting insert being capable of radiating effectively heat generated during the cutting machining process and having a structure by which a sufficient surface area is in contact with a tool holder and cutting fluid can be smoothly flowed. The cutting insert according to the present invention comprises an upper face and a lower face being opposite to each other, a plurality of side faces connecting the upper face and the lower face and a through hole passing through the upper face and the lower face, the upper face being divided into a periphery region disposed adjacently to cutting edges formed by the upper face and the side faces, and a central protruded region disposed between the through hole and the periphery region and surrounding the through hole, the central protruded region being placed higher than the edges. Here, the periphery region is formed along all the cutting edges and comprising an descent face inclined downward from the cutting edge to the central protruded region, a bottom face and an ascent face inclined upward from the bottom face to the central protruded region, and a plurality of grooves are formed on the central protruded region of the upper face, the groove being formed such that both ends of respective groove are directed to the adjacent cutting edges.
Abstract:
The present invention discloses an insert being capable of performing successively a cutting process and a chamfering process after mounting to the tool holder. An insert according to the present invention comprises a parting section for cutting a rotating work-piece; and a chamfering section having a width larger than that of the parting section, the chamfering section being formed integrally with the parting section at a rear side of the parting section to chamfer the work-piece cut by the parting section. A cutting edge to be contacted with the work-piece is formed at an upper edge of a front end surface of the parting section for cutting the work-piece, and the chamfering section has a step on at least one lateral side, and the forward surface of the step is formed of a curved surface to make an upper edge to chamfer an edge portion of a cut surface of the work-piece.
Abstract:
The cutting tool of the present invention comprises a cutting insert and a tool holder. The tool holder comprises: a base for supporting a bottom surface of the cutting insert; a clamping arm for pressing a top surface of the cutting insert; an insert receiving space formed between the bottom surface of the clamping arm and the base; and a supporting surface which defines an end of the insert receiving space and supports an end of the cutting insert. The cutting insert comprises: a first pressing region on the front portion of the top surface which is oriented in a vertically upward direction; and a second pressing region on the rear portion of the top surface which is oriented at an angle in the front direction.
Abstract:
The present invention relates to an internal groove insert. The internal groove insert comprises: a rectangular main body comprising a top surface, a lower surface, and first to fourth lateral surfaces; and first and second projections each projecting from the adjacent first and second lateral surfaces. The first projection has a first cutting edge at the side of the top surface of the main body, while the second projection has a second cutting edge at the side of the lower surface. The first and fourth lateral surfaces are inclined by an obtuse angle with respect to the top surface, while the second and third lateral surfaces are inclined by an acute angle with respect to the top surface. The central axis of the clamping hole is inclined to be parallel to the edge where the first and fourth lateral surfaces meet.