Abstract:
A milling cutter (10) is capable of receiving replaceable cutting inserts (70) of different shapes and sizes. The milling cutter (10) comprises a generally cylindrical cutter body (12). A plurality of insert seats (24) are formed about the outer periphery of the cutter body (12). Each insert seat (24) is adapted to receive either a cutting insert (70) of a first predetermined size and shape or an adapter (40). The adapter (40) includes a second insert seat (46) for receiving a cutting insert (70a, b) of a second predetermined shape and size. Clamping means (60) are mounted on the cutter body (12) and are operable to clamp the cutting insert (70) of said first predetermined size and shape in the insert seat (24) of the cutter body (12), or to clamp a cutting insert (70a, b) of a second predetermined size and shape in the insert seat of the adapter (40).
Abstract:
This invention relates to a chuck assembly (12) for a drill box (10) of a mine drill for releasably securing a mining tool (14) including a working end (16) and a depending rod-like member (18) for roof bolting and roof and face drilling operations and a method of using the chuck assembly. The drill box (10) includes a source of rotary power (20) and a drive member (22) operatively connected to the source of rotary power (20) to rotatably drive the chuck assembly (12). The chuck assembly (12) includes a spindle (28), a collet closer (32) and a collet (30). The spindle (28) is operatively connected to the drive member and has a sleeve (34) of a cylindrical shape including a threaded collar end (40) and a bottom end (37) and an opening (35) extending a selected distance from the collar end (40) to the bottom end (37). The collet closer (32) includes an annular housing (54) having an aperture (62) threaded for threadingly engaging the threaded collar end (40) of the spindle. The collet (30) includes a forward end portion (48) and an opposing tapered rear end portion (50) and an internal bore (56) capable of receiving the rod-like member (18) of the mining tool. The collet (30) extends a selected distance within the opening of the sleeve (34) such that the collet (30) closes uniformly around the rod-like member (18) of the mining tool (14) as the collet (30) is compressed within the opening of the sleeve (34) by the action of the collet closer (32) threadingly engaging the threaded collar end (40).
Abstract:
A cutting insert (120, 140, 210, 610, 510) is disclosed in which at least one corner portion of the insert has a penetrating segment (100, 400, 200, 500, 600) of a given radius for penetrating a workpiece and an adjacent finishing segment (105, 405, 205, 505, 605) having a greater radius or greater radii which follows the penetrating segment to improve the surface roughness of the workpiece.
Abstract:
A densified titanium diboride based ceramic composition is provided having W and Co therein and a fine grain size (Fig. 2). The composition has particular usefulness as a cutting tool (Fig. 1) for machining of titanium based alloys at high speeds (Figs. 4 and 5). The tool insert has cutting edge (70) flanked by rake (30) and flank (50) faces.
Abstract:
A coupling device for high speed rotation applications comprised of a first member (112) about a longitudinal axis (114) having a collar (120) integrally attached to a solid base (122) and a second member (130) about a longitudinal axis (114) having a sleeve (136) which is receivable within the collar(120). When the first (112) and second (130) members are rotated, the sleeve (136) expands within the collar (120) to minimize or eliminate any clearance that may exist between the sleeve (136) and collar (120). The coupling device may, among other applications, be utilized for machine tools such as milling cutters.
Abstract:
An arc hardfacing rod for producing a hard surface [Fig. 7] including a tubular member, a filler material, an insulating coating and a plurality of discrete metal carbide particles set within the insulating coating such that a surface of a portion of the metal carbide particles is uncovered. The filler carbide particles include tungsten carbide particles, titanium carbide particles, tantalum carbide particles, niobium carbide particles, zirconium carbide particles, vanadium carbide particles, hafnium carbide particles, molybdenum carbide particles, chromium carbide particles, silicon carbide particles and boron carbide particles, cemented composites and mixtures thereof. Adhered to the exterior surface of the tubular member is an insulating coating including a coating flux and a coating bonding agent. A plurality of discrete metal carbide particles are set within the insulating coating such that a surface of a portion of the metal carbide particles is uncovered. The metal carbide particles may be of the same composition as the filler carbide particles forming the filler material or the metal carbide particles may be macrocrystalline tungsten carbide particles, cast tungsten carbide particles, crushed sintered cemented tungsten carbide particles or pelletized cemented tungsten carbide particles, and mixtures thereof.
Abstract:
A cutting toolholder assembly for holding a cutting tool (26) used in a material removal operation. The assembly comprises a locking component which contains a bore (32) with at least one recess (34) therein. The assembly also includes a tool holding component (24) with a shank (48) whereby the bore receives the shank. The shank contains a compartment (50) with a locking assembly within the compartment. The locking assembly includes at least one locking member (56) and a positioner assembly (58) that selectively positions the locking member into engagement with its corresponding recess. The recess corresponds to the shape of the locking member such that when the locking member engages the recess, the recess restrains the locking member so that there is essentially no movement between the holder component and the locking component during a material removal operation.
Abstract:
A toolholder (10) includes a support (12) having an insert seat (18) for receiving a cutting insert (20). The cutting insert (20) is brought into engagement with a workpiece to remove a chip of metal from the workpiece. The toolholder (10) includes fluid chip-breaking means for directing a stream of high velocity fluid at the chip being removed from the workpiece to break the chip into small segments. The direction of the fluid stream can be adjusted so that a single tool can be used to perform a variety of cuts while optimizing the effectiveness of the fluid chip-breaking stream for each cut.
Abstract:
An apparatus is provided for transmitting rotation about and translation along a first axis (145) from a driver (60) to a toolholder with a spindle (130) along an axis (230) non-parallel from the first axis. A shaft (180) is rotatably mounted within a sleeve (150) which is slidably mounted within a bore along the first axis. The sleeve has an inclined surface (165) at one end which when the sleeve is translated engages an interface member (170) to provide displacement.
Abstract:
Provided is a coated cutting tool (10) having a binder enriched substrate (18). The coating includes at least one chemical vapor deposited (CVP) layer (30) and at least one physical vapor deposited (PVD) layer (34). The PVD layer contains residual compressive stresses.