Abstract:
A cutting tool holder of the kind in which the fastening screw (securing member) remains engaged with the tool holder seat during mounting/dismounting of the cutting insert. The seat is further formed with a support surface configured for engaging and providing support to the head portion of the securing member at least in the securing position.
Abstract:
A cutting insert (22) includes opposing forward and rear surfaces (34,36) and a peripheral surface (28) extending therebetween. The peripheral surface (28) includes opposing side surfaces (26) and opposing upper and lower surfaces (38,40). The upper surface (38) and the forward surface (34) intersect to form a main cutting edge (42) having an associated relief surface (44) that extends therefrom in the forward surface. One of the side surfaces (26) comprises an insert side abutment surface (60). The rear surface (36) comprises an insert rear abutment surface (50). The lower surface (40) comprises an insert lower abutment surface (52). The insert rear and insert lower abutment surfaces (50,52) form an obtuse abutment angle with respect to each other. In a side view along a side axis, a relief surface (44) line tangent to the relief surface intersects the insert lower abutment surface.
Abstract:
A rhombus-shaped cutting insert has opposing upper and lower surfaces, and a peripheral side surface extending there between having alternating obtuse and acute corner surfaces separated by four relief surfaces. The cutting insert is removably secured in an insert receiving pocket of a tool holder and indexable about a central axis. A nose cutting edge is formed at the intersection of one of the upper and lower surfaces with each of the two acute corner surfaces. One of the upper and lower surfaces has an engagement surface having a single primary and four secondary engagement elements. The primary and secondary engagement elements or portions thereof, exhibit mirror symmetry about primary and secondary engagement planes. The primary engagement plane contains the central axis and intersects each nose cutting edge, and each secondary engagement plane does not contain the central axis and forms an acute engagement angle with the primary engagement plane.
Abstract:
A cutting insert includes a first surface, a second surface and a peripheral surface extending therebetween, and an insert hole extending between the first and second surfaces and having a hole axis. A cross section of at least a portion of the insert hole taken perpendicular to the hole axis has an oval shape. The cutting insert also includes a mark provided on at least one of the first and second surfaces, indicating the orientation of the cross sectional oval shape of the at least a portion of the insert hole.
Abstract:
The flow of heat energy from the cutting edge rim of a self-propelled round annular rotary cutting element ('insert') to axial-load and radial-load bearings in a cartridge which rotatably supports the insert on a machine tool body is reduced by defining heat flow paths from the insert rim to cartridge components which engages the bearings to have low thermal conductance relative to heat flow paths from the insert rim to other parts of the cartridge. Control over heat flow path thermal conductance is obtained by selection of materials used between the insert rim and the mentioned cartridge components, by reductions in the cross- sectional areas of the critical heat flow paths, and by combinations of those two techniques. Protection of the bearings from heat enables the insert and the cartridge to be reduced in size. Improved mountings of insert-supportive cartridges to tool bodies are disclosed. The insert and the cartridge preferably are shaped to enable the insert to be positioned on a tool body so that the insert's rake face can have a positive rake orientation relative to a workpiece. Arrangements for controlling cuttings chip formation and for handling cuttings chips also are disclosed.
Abstract:
A cutting tool holder (110) configured for mounting thereon a cutting insert (140'). The cutting tool holder comprises a body (112) formed with an insert seat (120) configured receiving therein the cutting insert and a seat bore (135) configured for accommodating therein a fastening member (150'). The cutting tool holder also comprises an anchoring element (170) received within the body of the holder, the fastening element being configured for secured engagement with the anchoring element and being free of such engagement with the seat bore.
Abstract:
A double-sided cutting insert (21) according to the present invention includes two end surfaces (25) that each includes major rake surfaces (37) adjacent major cutting edges (33) that form first angles (α) with planes of the major side surfaces, and a central support surface (29) forming a second angle (β) with the planes of the major side surfaces. Each end surface further includes major intermediate surfaces (41) between the major rake surfaces and the central support surface. The major intermediate surfaces forming third angles (γ) with the planes of the major side surfaces that are greater than the first angles (α) and smaller than the second angles (β) when measured in a central plane (CP) that extends along a central axis (A) of a hole (35) and is generally perpendicular to the planes of the major side surfaces and planes of the central support surfaces. The present invention also relates to a cutting tool.