Abstract: The invention relates to abrasive tools such as a cutting tool for a mining machine. Located in a socket 18 of the tool is a cutting insert comprising an elongate pin 22 having a bottom conical end 24 located in the recess and a top control portion 26 to which is bonded a composite abrasive compact. The composite abrasive compact having an abrasive compact layer 34 bonded to a cemented carbide substrate 36. The socket 18 complements the shape of the elongate pin 22 and, in particular, the bottom conical end 24. This arrangement minimizes the occurrence of stress raisers.

Abstract: The invention is a honeycomb core cutting tool wherein a primary cutter is used to cut the core to shape and secondary cutters are used to immediately shred that portion of the core being removed. The primary cutter is typically a commercially available circular saw blade modified by the machining of a plurality of peripherally located, radially inward directed slots dividing the primary cutter into segments which can be formed into a concave shape. A retainer threadably engages the end of the shaft and is used to force the primary cutter against a concave surface of a flange mounted to the shank of the tool, causing the primary cutter to deform into the concave shape. Mounted behind the flange and primary cutter are two "slot" cutters for shredding the portion of the core being removed.

Abstract: A method and arrangement for detecting a wear limit or break in a cutting edge of a machine tool. At least two conductor paths are embedded in the cutting material forming the cutting edge, one of the conductor paths being part of a closed circuit while the other is part of an open circuit. A signal serving to break off the machining process is produced if either the conductor path disposed in the circuit is interrupted or the open circuit is closed by the creation of a conductive connection between the two conductor paths.

Abstract: A replaceable on-edge cutting insert is especially adapted for use in end-milling cutters of small diameter, viz., in the size range down to one-half inch in diameter, and with cutting geometry which positions the rake face of the insert in the cutter body with substantially neutral radial rake and positive axial rake. A modified form having a cylindrical primary clearance land is used in the tip cutting positions of a ballnose end mill.

Abstract: The cutting tips (1, 2, 3, 4) consist of sectors of an annulus, the surface corresponding to the inner arc being a segment of a cylinder in contact with a ball (11) fastened to the axle of rotation of the tool-holder (5). The tips (1, 2, 3, 4) are sharpened into a cone by means of circular grinding on their surface (1a, 2a, 3a, 4a) corresponding to the outer arc, being fastened in one and the same plane on a grinding assembly, their inner arc being in contact with an axle having the same radius as the ball (11).The invention is used on rotary tools with multiple cutting edges, especially on spherical milling cutters and reamers.

Abstract: The present invention relates to a cutting insert (11) for length turning, inwards turning and outwards transversal turning having a generally rhombic or triangular basic form with a cutting edge (14), a cutting edge (15) and a transversal turning edge (18). The transversal turning edge (18) is arranged to cut and break coarse but short chips (21) and the cutting edge (14) is at the same time arranged to cut fine and continuous chips (22) to obtain a good surface fineness during the transversal turning operation.

Abstract: There is disclosed a base and block assembly for use with an earthworking bit. The assembly comprises a base and a block engaged in the base. The block has a shank portion and a toolholder portion extending from a first end of the shank and adapted for receiving the earthworking bit. The assembly also comprises means for causing the block to preferentially fail when exposed to abnormally high cutting loads. Also disclosed is a method for protecting the base of a base and block assembly when in use with an earthworking bit. The method comprises preferentially weakening the block so as to cause the block to fail when exposed to abnormally high cutting loads and engaging the block with the base.

Abstract: A self-sharpening refractory metal cutting tool presenting an overhanging cutting portion, i.e. a flange, or ledge, of width equal to (or slightly greater than) the depth of the cut to be taken and maximum thickness equal to tolerable tool flank wear is disclosed. This tool construction has special utility in a novel high-speed cutting method in which only the tool flange does the cutting in which operation the flange is worn away with the wear progressing lengthwise of the flange during which time the flange sequentially performs a roughing cut and then a finishing cut in a single pass.

Abstract: A cutting insert includes a planar body member formed unitary with peripheral ledges of smaller width than the body member, with the ledges being configured and aligned relative to the body member to achieve desired rake angles, both axial and radial as well as the clearance angle desired of the cutting geometry. In operation, each elongated ledge defines the cutting edge of the cutting insert and during operation of the cutting insert, the ledge is consumed and thus generates a fresh edge behind it along the entire length of the ledge such that the cutting process may be maintained continuous until the entire length of the ledge is consumed. The cutting insert may then be indexed to the next ledge cutting edge.

Abstract: An improved cutting insert for rotary cutting tools is disclosed. The cutting inserts are characterized by a center bushing made of metal that is softer than the conventional sintered tungsten carbide or titanium carbide used for the cutting body of the inserts. The center bushing may be secured on each cutting insert by using braising, shrink fitting, oxidation bonding, or high energy bonding techniques. Additionally, conventional plating techniques may be used.

Abstract: The disclosure relates to wood chippers having a chip separation surface comprising unitary ribs which, after grinding of the cutter, form chip separator tips.

Abstract: A worn indexable cutting insert having a centrally located hole is reground to a smaller standard size. A tubular bushing is pressed into the hole to reduce the effective diameter thereof and enable a smaller locking pin to be used with the insert.

Abstract: A face grooving tool is disclosed for machining circular grooves in a metal workpiece. More particularly, a face grooving tool includes an elongated shank having an arcuate support blade projecting axially outwardly from one end thereof. The leading surface of the support blade includes an offset V-groove configuration, with the vertex thereof being located nearer to the radially inner surface of the support blade than the radially outer surface. By this arrangement, the radially outermost portion of a cutting insert, which is receivable in the offset groove, is provided with added support during a cutting operation. The arcuate configuration of the support blade enables the blade to be received in the circular groove being machined in the workpiece thereby providing continuous support for the insert.

Abstract: This invention relates to an indexable broadnosing cutting insert for use in boring and broadnosing applications, especially where a floating type of boring head is required. This insert, preferably, has a triangular-like shape. Each side of this triangular-like shape actually being made of three angularly related faces: a forward lead clearance face, a middle clearance face and a rear relief face. The forward lead clearance face and the middle clearance face are joined to the top face of the insert by a narrow, vertical wiper face.

Abstract: In an earth boring tool an improved sintered tungsten carbide insert and surface conditioning method to improve retention within an interferringly sized hole and to decrease the frequency of fracture of the inserts. The insert has a randomly varied surface finish that is obtained from abrasive treatment with particles having hardness greater than 9.0 on Mohs' Scale. The particles are selected from the class consisting of silicon carbide, boron carbide, boron, and diamond. The resulting surface has asperities varying from a maximum value, smaller than that formed by grinding, to a minimum value, larger than the mat finish obtained by abrading with aluminum oxide.

Abstract: The rotary cutter tool assembly, including cutting insert, of the present invention is adapted to perform a finishing operation within a tube in such manner that tube wall thickness is ensured. To this end, the novel insert is provided with a guiding surface adjacent to the cutting edge of the insert, which guiding surface is displaced towards the central portion of the insert at a distance corresponding to the desired depth of cut. The insert is secured to the rotatable cutter head in such relation that said guiding surface precedes the cutting edge in the direction of rotation of the cutter head.

Abstract: This invention pertains to a cutting tool bit as used with and in the back spot facing tool as shown in my U.S. Pat. No. 3,827,821 as issued on Aug. 6, 1974. As shown in this patent the cutting tool bit member has unequal projections and cutting faces and it is contemplated that the shorter blade portion is three-quarters the length and has an effective cutting area three-quarters of the full length blade portion. To insure a smooth and flat spot face a precise grinding of this cutting tool bit is required. It is also required that the chips be directed in a desired spiral away from the cutting tool. An eight degree slope is provided as an angled face on the top surface of the cutting tool. The cutting edge of the cutting tool bit is also relieved preferably by a three degree slope away from the cutting edge.

Abstract: The rotating cutter head of a reamer is formed with a recess, open in a radially outward direction and one circumferential direction relative to the axis of rotation, and a blade is retained in the recess between opposite, radially extending faces of the head and of a clamping shoe that may be adjusted inward of the recess. Two face portions of the blade are engaged by the respective faces of the head and shoe in area contact in planes which converge in a radially outward direction at a small acute angle to prevent movement of the blade from an initial, radially adjusted position under cutting stress.

Abstract: A thread chaser tool with cutting edge defined by two symetrical points. The tip radii of the two points are spaced apart slightly less than the pitch of a thread to be cut. The thread form is generated by the inside flanks of each point and a crestforming radius there between. Both points cooperate in forming the long flanks of either male or female tapered threads, and both points form straight threads having two roots.

Abstract: The present milling tool for crankshafts is equipped with an electric hea to assure uniform tool temperatures throughout its operation and to thereby avoid tolerance variations in the milled workpiece. The present milling machine is equipped with contact elements for supplying an electric current to the heater in the milling tool proper.

Abstract: An insert, especially a hard wear resistant insert, such as an insert of cemented hard metal carbide, for use in a mining tool or the like. The insert is especially adapted for being press fitted into the body of a mining tool or the like but may also be brazed or cemented therein. The insert has a rounded outer end and a flat inner end and tapers inwardly immediately adjacent the flat inner end and is rounded at the periphery of the flat inner end thereby eliminating stress risers in the insert and providing for easier insertion thereof into a bore in a tool body into which the insert is seated.