Abstract: A method and apparatus for machining a workpiece to perform several functions including sensing tool wear, enhancing tool life, tool wear compensation, cutting a workpiece having two different materials joined at a boundry, and suppressing chatter, including placing a cutting tool having a rake face and a clearance face with a first clearance angle with respect to a workpiece and a second clearance face with a second clearance angle with respect thereto and with the first clearance angle being less than the second clearance angle and supporting the cutting tool in a rotatable tool holder having an axis of rotation with the cutting tool tip being aligned with the axis of rotation such that rotation of the holder varies the cutting tool geometry to perform the several functions.

Abstract: An adjustable face milling cutter is carried on a turntable rotatable about a central axis that is coaxial with the cylindrical shell of the steam generator in which the tubesheet is located, to machine a circular path on the upper tubesheet surface. For complete circle-by-circle scanning of the tubesheet surface, the radius of the circular machined path is variable by virtue of mounting the milling cutter on the outer periphery of a circular mounting member turnable to different locked rotary positions about an off-center pivot axis on the turntable. The rotary support for the turntable is at its outer periphery, as provided by an encircling support ring which in turn is supported by a ball bearing assembly having an inner race secured to the turntable top and an outer race secured to the support ring top; teeth on the inner race being provided to accommodate a motor-operated drive gear.

Abstract: A tool feeder for transferring a tool to a tool receiving device includes a base plate fixedly mounted adjacent to the receiving device and a carriage mounted on the base plate for selective alignment with the receiving device. The carriage is coupled and positionable relative to the base plate.

Abstract: A tool driver for rotary cutting tools, such as reamers and drill bits, is described, along with rotary cutting tools of a novel design. The driver comprises a shank member having a cylindrical portion projecting axially from one end thereof and this cylindrical portion has at least two spline members projecting longitudinally from the end thereof remote from the shank. These spline members have curvilinear outer faces forming extensions of the cylindrical portion and also project inwardly to provide a central axial gap and radial gaps therebetween. A cylindrical sleeve member is rotatably mounted on the cylindrical portion and splines and this sleeve member has at the outer ends thereof radially inwardly projecting tab members which are adapted to engage notches in peripheral lands between the flutes of straight flute cutting tools when mounted in the driver.

Abstract: The tool for machining pneumatic tires for vehicles comprises a plurality of peripherally consecutive, segment-shaped cutter blades, which constitute a peripheral surface of the tool and are axially spaced apart and extend in planes that are transverse to the axis of the tool. Each of said blades has a radially outer edge and cutting tools carried by said outer edge. The radially outer edge of each of said blades comprises at least one tooth-carrying edge portion which is bent out of the plane of said blade. Peripherally consecutive ones of said tooth-carrying edge portions of said tool are bent out to opposite sides.

Abstract: A chipbreaking insert for metalcutting is useful for breaking chips over a wide range of speeds and feeds. In light cuts, the chips are broken by a finishing depression adjacent to the cutting corner. In deeper but still moderate cuts, the chips and broken by a chipbreaking groove which is parallel to the cutting edge. In heavy cuts, the chips are corrugated and deflected away from the workpiece by a series of cylindrical chip deflecting grooves spaced along the cutting edge.

Abstract: A cutter head, for high speed face-milling cutting, with cutting plates pressable by centrifugal force against recess walls of the cutter head body. The cutting plates are arranged in recesses, of the cutter head body, with walls directed radially outwardly toward each other and having a dovetailed cross section tapering toward the chip space, the cutting plates being respectively held by a clamping piece having an inclined surface which is located opposite the free surface of the cutting plates. The cutting plates, which may be multiply arranged in common radial planes, are identical and are disposed with their cutting edges in a common tangential plane. Adjacent cutting plates of one radial plane, and forming a row, may be axially longitudinally displaced relative to the cutting plates of a second or third radial plane.

Abstract: A tool storage magazine of the type wherein a plurality of tool sockets each for removably storing a cutting tool therein are pivotably carried on an indexable element is provided with an engaging member moved by a hydraulic cylinder for pivoting each tool socket at a tool taking out position from a horizontal position to a vertical position through engagement with a pair of engaging rollers which are rotatably supported by each tool socket and located outside the side faces of each tool socket. The magazine is further provided with a locking mechanism which prevents a holding plunger of any tool socket indexed to the tool taking out position from being disengaged from a tool received in the tool socket until the tool socket is pivoted to its vertical position.

Abstract: A cutting insert of the indexable type comprises intersecting planar surfaces which form a pair of chip control channels associated with a respective cutting edge. The channels merge at respective corners and terminate at an intermediate land portion which is interposed one planar surface and the lowermost portion of the channels.

Abstract: A tool holder for a cutting insert comprising, an insert receiving base member; a locating pin projecting out of the base member so as to extend through a central bore formed in the insert when the latter is located on the base member; a clamping member juxtaposed with respect to the base member so as to be supported by a support zone of the tool holder; a first support surface of the support zone located substantially parallel to the base member; a second wedging surface of the support zone; an elongated recessed portion between the base member and the first surface and into which the wedging surface slopes towards the base member; a rearwardly disposed elongated heel portion of the clamping portion; a forwardly disposed nose portion of the clamping member; a curved abutting surface of the nose portion; an elongated tail portion formed integrally with the nose portion so as to project into the recessed portion in abutting relationship with the wedging surface; and screw biasing means located intermediate sai

Abstract: An aspherical surface generating method and apparatus which optimizes the path of a moving cutting tool tip to fit a given aspherical surface of revolution to be cut on a rotating work piece engaged by the moving tip. The apparatus is a modified spherical generator, the modifications and control of which adapt it to continuously match the curvature of the path of the moving cutting tool tip to that of the given aspherical surface of revolution by adjusting the dynamic machine center in the direction of the evolute of the curve, i.e. along the locus of the radius of curvature of the given surface at the tool tip.

Abstract: A composite rotary tool including a working surface extending from the leading end of the tool for forming a hole in the material being worked, and at least one cutter positioned beyond the active working surface for removing a small amount of material from an edge of a formed hole during the period of the forward and reverse strokes of the tool. The cutter may perform its function during a normal complete cycle of the tool operation.

Abstract: Disk surfaces for magnetic disk memories used in data processing systems are smoothened by a burnishing-like device consisting of a circular-cylindrical-shaped body (sliding block) having opposing flat base surfaces with at least one sharp-edged groove positioned on at least one of the base surfaces. This smoothening device is pressed manually or by a support mount similar to a magnetic data-head support mount of a magnetic disk memory against a disk surface while relative motion is provided between the device and the disk whereby the groove edges contact any surface irregularities on a disk surface being smoothened while the flat areas between the groove edges prevent undue disk surface damage.

Abstract: A sintered cutting tip composed of70-90 weight percent of aluminum oxide;10-30 weight percent of zirconium oxide;0.1-0.5 weight percent of magnesium oxide,and less than 0.6 weight percent of impurities, having a porosity of less than 2%,an average particle size of less than 1.7 .mu.m, and a fracture toughness K.sub.Ic at room temperature of at least 190 N/mm.sup.3 /.sup.2 and of at least 140 N/mm.sup.3 /.sup.2 at 1000.degree. C.A method for manufacturing the cutting tip and its use are disclosed. Cutting tips in accordance with the present invention possess superior performance in terms of longer cutting life and are particularly suitable for use with case-hardened, quenched and tempered steels at high cutting speeds.

Abstract: A drill bit having a generally cylindrical body with a working end and flutes extending along the body. The working end is formed with a central work-engaging point and a pair of slitting spurs spaced outwardly from the point adjacent edge margins of the body. Convexly contoured portions interconnect the point and spurs to permit sharpening with a round file.

Abstract: A manually operated apparatus for driving a member such as a tool or fastening element into the surface of a receiving material includes a device for driving the member, a base supportable on the surface into which the member is to be driven, and a holder attached to the device and pivotally connected to the base for providing a visual indication of an angular disposition of the drive axis of the device relative to the surface of the receiving material and for positioning the drive axis perpendicular to the surface.

Abstract: Apparatus for facing and internal turning includes a rotatable shaft and a turning head fixed for rotation with the shaft. A tool carriage for carrying a cutting tool is displaceable on the turning head transversely to the axis of rotation thereof. The transverse displacement of the carriage is effected by way of two planetary gear units lying in planes at right angles to the axis of rotation of the shaft. The sun gear of the first unit is fixed for rotation with the shaft, whilst the sun gear of the second unit, which acts as a driving gear for the tool carriage, is rotatable relative to the shaft. A further ring gear is disposed coaxially with said gear units and engages a gear connected for rotation with the planet gear of the second unit. Fastening means selectively lock said further ring gear against rotation whereby the sun gear of the second unit is rotated relative to the shaft and effects transverse displacement of the tool carriage.

Abstract: An elongated relatively rigid yet resilient tool compensating bar formed from rectangular bar stock with strategically placed slots to form three basic body members, namely a stationary body member, a lower body member, and an upper body member. The stationary body member is adapted to be secured in fixed position to a suitable support. The lower body member has side portions along opposite sides of the base member, being separated from the base member by a pair of slots and integrally connected to the base member by a flexure web or neck of the bar between said slots adjacent one end of the bar. This flexure web enables the lower body member to flex laterally relative to the stationary member. The upper body member is disposed over the stationary and lower body members and is separated therefrom by a third slot.

Abstract: According to the present invention, a brushing mechanism for brushing an end face of a metal material to be brushed and an angle detector for detecting an inclination of the end face of a metal material to be brushed are rested on a frame mechanism, said frame mechanism is provided in such a manner as to be swingable or fixable with respect to a base, a side surface of said angle detector in parallel to a brushing surface of said brushing mechanism is moved into a space formed between the end face to be brushed and the brushing surface of said brushing mechanism and brought into abutting contact with the face to be brushed, and the frame mechanism is swinged and inclined commensurate to the inclination of the end face to be brushed by the abutment of said angle detector against the face to be brushed, whereby the brushing surface of said brushing mechanism is brought into parallel to the end face to be brushed, so that the brushing of the end face to be brushed by said brushing mechanism can be effected in pa

Abstract: A drilling machine comprises a ram movable up and down on a carriage slidably mounted on a horizontal crossrail. A toolhead is mounted on the bottom end of the ram for pivotal movement about a horizontal axis at right angles with the crossrail and is pivoted to a desired angular position by a first drive shaft within the ram via bevel gearing. Rotatably mounted in the toolhead for rotation about an axis lying in a vertical plane is a toolholder which rigidly supports a drill and which is driven from a second drive shaft within the ram via bevel gearings. Preferably, the machine further comprises a rack-and-pinion mechanism driven from the second drive shaft for securely but releasably locking a turning tool at the bottom end of the ram, so that the machine can be used also for turning operation as a workpiece is rotated on a turntable. This turntable is of course held stationary during drilling operation.