Abstract: Amorphous boron-carbon alloy cutting tool bits and methods of making them are described. The tool bits can be composites of conventional hard alloys containing the amorphous boron carbon alloy in a first layer over a conventional hard alloy layer such as cobalt bonded tungsten carbide. The amorphous boron carbon alloy used is preferably produced in bulk with a grain size less than 30 .ANG. and ground into a powder. The tool bits are produced by cold compressing, in a tool bit die, the lower layer material at about 2000 psi followed by hot compressing the composite containing the added amorphous boron carbon alloy powder at about 1350.degree.-1500.degree. C. The resultant cutting tool bit has a cutting lifetime at least four times that of conventional carbide cutting tool bits even when cutting such things as nickel superalloys at speeds in excess of 125 surface feet per minute (SFM).

Abstract: An indexable insert end mill having multiple triangular inserts spaced axially in overlapping cutting relation in isolated pockets arranged along a gradual helical angle extending axially of the end mill such pattern of axially spaced cutters being repeated at three 120.degree. circumferentially spaced positions on the periphery of the body. In a typical case the three helical rows of inserts each has five inserts equally spaced axially in overlapping relation and circumferentially in 40.degree. increments so that three effective teeth are provided at each of the five axial positions.

Abstract: In a machine tool, the tool is moved using a signal representing a required profile of the surface being machined. This signal is fed to a transducer, such as a piezoelectric crystal or a D.C. linear motor, which converts the signal into a corresponding linear movement which is transmitted to the tool. The tool can also be vibrated ultrasonically during machining. Such machines can be used for producing workpieces which are non-circular in cross-section and/or which are barrelled or tapered along their length.

Abstract: In order to permit the use of bars of material to be machined without a piminary preparation of the rearward end of the bar being necessary, the pusher head presents ribs extending inwardly, and the surfaces of which directed toward the axis form cone portions. Between these ribs are free spaces where possible burrs may lodge. The ribs include shearing edges for eliminating the burrs if the burr is located on a rib, rather than in the free space. Furthermore, the angle of conicity is small. Thus, a rear bar face in rough state, not having been prepared by straightening or taper turning, does not express itself by any appreciable decentering.

Abstract: Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading and to enable cutting force to be directed through a large cross-sectional area of the insert.

Abstract: An end milling cutter has a cutter head with a pair of opposed slots extending longitudinally inwardly from the end face and generally radially from the lateral surface to a central cylindrical bore. Each slot forms insert-supporting shoulders which extend from the core to the lateral surface of the head. A triangular cutting insert is received in each slot and is supported on one side by the shoulders. A pressed dimple extending inwardly of the cutter head from the end face, engages and supports a second side of each of the inserts such that the cutting edges thereof are at a prescribed diameter.

Abstract: The invention relates to a device for clamping cutting inserts in recesses of cutter supports comprising a cam rotatably mounted in the cutter support and a clamping member provided on the cutter support. The clamping member is adapted to be pressed by the cam against the cutting insert and is designed as a pin secured in the cutter support in a cantilever manner. The free end of the pin is adapted to be displaced by the cam towards the cutting insert. In order to improve the run-off of cuttings, a clamping plate engaging the cutting insert is provided on the free end of the pin.

Abstract: The invention is a rotary selectively directional valve assembly for use in an automated turret lathe for directing a stream of high pressure liquid machining coolant to the interface of a machine tool and workpiece for breaking up ribbon-shaped chips during the formation thereof so as to inhibit scratching or other marring of the machined surfaces by these ribbon-shaped chips. The valve assembly is provided by a manifold arrangement having a plurality of circumferentially spaced apart ports each coupled to a machine tool. The manifold is rotatable with the turret when the turret is positioned for alignment of a machine tool in a machining relationship with the workpiece. The manifold is connected to a non-rotational header having a single passageway therethrough which conveys the high pressure coolant to only the port in the manifold which is in registry with the tool disposed in a working relationship with the workpiece.

Abstract: The cabinet hinge mounting plate can be fastened to a cabinet wall by means of screws passing through openings provided in it in the form of slots. The slots are configured such that the screws associated with each of them, which are threaded only on a portion of their length but have an unthreaded section adjacent the screw head, will be held temporarily by their threaded portion in a central position in the length of the slot, but when they are driven all the way in they will be displaceable lengthwise of the slot. The slots have in the area of their central portion projections protruding each toward the opposite slot edge for the purpose of holding the crests of the threads of the associated fastening screws. At their upper side facing the head of the screws the slots are provided with a rebate which is engaged by a centering section of the screw, which is formed in the transition between the head and the shaft of the screw.

Abstract: A tool mounting between a cutting tool, for example a drill, and a machine spindle, comprising a tool element and a tightening device. The tool element consists of a body and an expandable attachment tap. The attachment tap is formed with grooves to receive a gripping implement of a tool interchanging mechanism and with a through opening to receive an end portion of a pull rod. The tightening device comprises a pull rod movably mounted in an inner pipe and forwardly projecting resilient portions. During changing to an other tool the opening at the attachment tap (13) is moved over the end portion by means of the gripping implement while a wall of the opening of the attachment tap slip against the resilient portions until a stop pin on the tool shank engages the end surface of the end portion and the resilient portions snap into recesses in the hole wall.

Abstract: A tool holder having a head with four pockets, each for supporting an indexible insert. Each insert is mounted on the head such that it can be indexed to reposition a plurality of cutting edges on the insert. The head has a shank rotatably mounted in a body supported on a machine, such as a lathe. A handle connected to the shank is used to replace an insert in a cutting position with another insert merely by rotating the head and without repositioning the body.

Abstract: A sanding tool comprises a plurality of saw blades arranged in spaced relation projecting from a planar surface of a rigid plastics supporting member a distance of the order of 1/8 inch. The spacing of the blades is very much wider than the width of the blade to provide a self-cleaning effect and the plastics member provides a shoulder alongside each of the outermost blades so that the shoulders prevent gouging of the blades.

Abstract: A bar stock feeder for an automatic lathe, comprises a cover tube provided adjacent a rear side of a spindle of the automatic lathe, and a rod guide tube is provided in the cover tube. A push rod is slidably mounted in the rod guide tube in order to feed a bar stock to the lathe. The push rod is moved by a chain driven by sprocket wheels. Lubricating oil is supplied to the rod guide tube for preventing the vibration of the bar stock during the machining operation.

Abstract: An oblique edged cutting tool comprises a holder at the front end of which is formed an inclined surface on which a flat tip is detachably mounted by means of an attaching member. The tip to be used is of an indexable throw-away type having an outer configuration radially symmetrical about its geometric center and the tip is provided with a straight or curved cutting edge on the outer periphery thereof. The tip is attached to the holder of the oblique edged cutting tool so that the upper and lower flat surface of the tip is positioned in parallel or normal to a surface of a work to be machined.

Abstract: The machine tool parts and method of making same includes providing cooperating attachment means between the shank and the tool bit head assembly, wherein a predetermined portion of the attachment means on the shank is located a first predetermined distance from a fixed reference on the shank and the cutting edge of the tool bit head assembly is located a fixed predetermined distance from a portion of the attachment means on the tool bit head assembly, corresponding to the predetermined portion of the shank attachment means, with the additive sum of the first and fixed predetermined distances defining a predetermined cutting height of the cutting edge. Preferably, the attachment means comprise a key formed on the head assembly and a correspondingly proportioned key-way formed on the shank. The fixed reference on the shank is its bottom surface and the predetermined positions on the attachment means are the lowermost abutting edges of the key and key-way.

Abstract: An indexable cutting insert (10) for a tool (18) adapted to cut internal right-angled corners in a work piece (19). The insert (10) has a square configuration and comprises a top major surface (11), a bottom major surface (12) and connecting side surfaces (13). The lines of junction between the top major surface and the side surfaces define the main cutting edges (14) and the minor cutting edges (15). The main cutting edges (14) transite into the second cutting edges (15) in the corners of the insert. Each second cutting edge (15D) projects from the square basical shape so that it will lift the inactive main cutting edge (14A) from the machined surface under the insert.

Abstract: An indexible insert is mounted on a shank. The insert includes angled centering surfaces which engage angled localizing surfaces on the shank. The insert includes abutment surfaces which engage support surfaces on the shank. The point of contact between the abutment and support surfaces is located farther from the working cutting edge than is the point of contact between the centering and localizing surfaces. Thus, when the working cutting edge is acted upon by a lateral force, the abutment and support surfaces bear against each other with a greater force than do the centering and localizing surfaces. Accordingly, less wear occurs at the centering surfaces.

Abstract: An indexable cutting insert for a variety of turning operations, which mainly has a rhombical or triangular basic form. The cutting corners of the cutting insert are provided with nose portions. Each nose portion is expanded in the width direction at an acute-angled corner mainly symmetrically about the bisector of the cutting corner. Thus the cutting insert achieves a locally large setting angle or clearance angle.

Abstract: A throw-away insert has a cutting edge (12) along its outer periphery and between adjacent noses (11). A concave rake surface (8) is formed which extends directly form the cutting edges (12) toward the center of the insert. A plurality of bosses (10) and a plurality of projections (9) are spaced a predetermined distance from the cutting edges (12) and extend above the rake surface (8). A plurality of lands (5) which are spaced at predetermined intervals (16) from each other are located along the cutting edge (12) and on the rake surface (8).

Abstract: In a milling tool with a disc-shaped base member 1 having a central securement bore 2 and provided, in the region of its outer periphery, with equidistantly spaced retainer cutouts open towards the front face of the base member, for receiving and for retaining the respective cutting plate support 4, which is adapted and fixedly secured in the respective retainer cutout 3 for selective adjustment both in an axial as well as, independently therefrom, in a radial direction. Each support 4 carries a cutting plate 6 or 62 whose main plane is disposed generally radially.