Abstract: Chip control insert characterized by a chip control groove extending across polygon insert corners and along edge extending from corners with increasing width away from the cutting corner. The groove is formed with a radius extending below a narrow positive rake cutting edge land to a maximum depth tangent with the bottom of the groove.

Abstract: A pipe lathe is disclosed for performing work on the end of a pipe. An arbor assembly having an arbor shaft is inserted in the end of the pipe. A hub having a frame is positioned on the arbor. An arm from the frame carries a cutter holder. The arm projects over the end of the pipe to position a single point cutter for cutting the outer surface of the pipe. Spiral threads coupled to the arbor shaft engage spiral threads on the hub to move the hub and frame toward or away from the pipe end when the hub is rotated to provide automatic longitudinal progression of the cutter along the outer pipe surface as the hub rotates. Automatic radial progression of the cutter toward or away from the center of the pipe is provided by two sprockets, a chain between the sprockets, and gearing on the cutter holder. One sprocket is located on the arbor shaft and does not rotate in relation to the arbor shaft. The other sprocket is located on the frame.

Abstract: A lathe for machining a balloon-shaped pocket in a turbine rotor comprising a carriage disposed on ways to move axially along the bed of the lathe, a cross-feed mounted on the carriage, the cross-feed moving toward and away from the axis of the lathe and a tear-dropped shaped tool holder for holding a single-edged cutting tool disposed on the cross-feed in such a manner that the cutting tip of the single-edge tool moves in a circular arc and cooperates with the cross-feed to cut a balloon-shaped pocket in a turbine rotor.

Abstract: The pedestal of the accessory apparatus, to be secured to the cross-slide of an automatic lathe, has a sliding guide arrangement for a bearing box in which a rotor is hydrostatically mounted for rotational and longitudinal movement. The rotor is held by a spring with its hydrostatically supported feeler-roll against a control curve which is accommodated encased in the bearing box. The rotor is connected by a sliding key connection to a key shaft seated fast on the shaft of an electric motor secured to the bearing box. The rotor is equipped at its front end with a slide plate guided for radial displacement, to which two diametrically opposite tools are secured. With one of these tools, an outside cylindrical surface adjoining a shoulder is machined on a non-rotating workpiece, whereupon the workpeice is rotated through 180.degree. so that the shoulder can be machined with the aid of the other tool, the slide plate being radially displaced on the rotor until it reaches a stop position.

Abstract: A lathe having no sliding bed. A cross slide is slidably arranged on a first guide cylinder mounted in a lathe bed, a second guide cylinder crossing at a right angle with the first guide cylinder is arranged on the cross slide, a slide shaft sliding along the second guide cylinder is arranged, and a tool rest is fixed at the extremity end of the slide shaft.

Abstract: A clamping mechanism for mounting a tool holder or receiving sleeve having a cylindrical outer contour to a machine tool having a bed, the clamping mechanism comprising a slide mounted for sliding movement on the bed and having a concave surface for supporting the cylindrical outer contour of the tool holder sleeve, an apparatus for securing the slide on the bed, and a clamp assembly including a clamping bracket circumferentiallyspanning the tool holder sleeve, an arrangement for detachably securing the clamping bracket to the slide, and a threaded structure for tightening the clamping bracket around the tool holder sleeve.

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: A milling cutter comprising a shoe (12), which is secured to the cutter body (10) and carries a cutting insert (11). The shoe (12) is adjustable by means of an adjustment means (13) and clamped by means of clamping means (14,15,16). The adjustment means (13) is adapted to bridge an inner corner (26) on the shoe (12) and the clamping means (14,15,16) comprises a pin (15) which is displaceably arranged in the shoe (12) at the outer end thereof, said pin (15) being adapted to be forced against a supporting surface (28) on the cutter body (10) opposed to the supporting surface (22) on the shoe (12) by means of a clamping screw (16).

Abstract: A hydraulic circuit for use on a turning machine (10) having a quill (32) which is movable to an extended and retracted position for detecting, through pressure drop, when the quill (32) is fully retracted or extended and engaging a workpiece. The quill (32) is positioned by a hydraulic cylinder (40) which is operated from a hydraulic power supply (60). A pressure actuated switch (48) is connected to one of the operating ports on the hydraulic cylinder (40) and a orifice (70) is connected to the same port. By detecting when the pressure sensitive switch (48) is activated with respect to positioning of the hydraulic cylinder (40) proper functioning of the quill (32) can be determined. A timer (90) circuit is provided for determining that the pressure sensitive switch (48) changes position within a set time period after the hydraulic circuit is activated to change position of the quill (32).

Abstract: A workpiece is set up and held on a machining axis to allow machining of the outer surface in a single operation. The workpiece is lightly clamped between a headstock and a tailstock and a datum surface is provided which is a datum distance from the machining axis. An aligning mechanism aligns the surface of the workpiece with the datum surface so ensuring that the workpiece surface is a required distance from the machining axis. The clamping pressure is then increased to hold the workpiece in this position ready for machining in a single operation.

Abstract: A machine for supporting bar feed stock in a turning tool. The machine includes a main tube having a cylindrical inner wall and an intermediate guide tube rotatably mounted inside the main tube. The intermediate guide tube has a cylindrical outer wall and an interior elongated opening. The interior of the intermediate guide tube receives the workpiece with an end portion of the workpiece extending into a spindle of the turning tool and with the interior opening fitting closely around the bar feed stock. The intermediate guide tube is connected to the spindle to rotate therewith and with the workpiece. Liquid in the main tube surrounds the intermediate guide tube. The intermediate guide tube tends to become centered in the main tube as the spindle turns.

Abstract: A boring head of a multiple-operation machine tool comprises a housing which is kinematically coupled to a spindle and adapted to accommodate a carriage spring-biased against the housing, carrying a mandrel for a cutting tool and having a slanted surface to interact with a slanted surface of a rod arranged in the housing coaxially with the latter and kinematically coupled to a drive which moves it in the axial direction. The boring head also incorporates a counterbalance comprising at least a pair of pins received in through holes provided in the carriage. The holes are symmetrical with respect to the axis of rotation of the boring head and extend at a perpendicular to said axis of rotation. The pins are kinematically coupled to the rod so that they can reciprocate in the through holes of the carriage.

Abstract: A tool for a nc machine is provided with a radially displaceable surface slide serving as a tool holder. The tool head is interchangeable by a tool head changing device mounted on the nc machine. The tool head is automatically releasably mounted on the work spindle by means of a clamping cone and a tie rod concentrically disposed within the work spindle and engaging the conical surface of the clamping cone. There is provided a pair of control rods for radially displacing the surface slide and for limiting the radial movement of the surface slide, which control rods are adapted to be automatically separated by releasable clutches for interchanging the tool head (FIG. 1).

Abstract: The present invention provides a tool support for a hand held wood turning tool. The tool support includes a parallel sided elongated slot through which the tool extends during use and which restrains rotational movement of the tool about its longitudinal axis. The support also includes a planar support surface in front of the slot and provides additional tool support.

Abstract: A cutter body has a plurality of detachable blades mounted in a cutter body plate which extends into a hub that is mounted on a power shaft. Each blade comprises an upper blade edge and a lower blade edge held in place by a block which is removably retained on the cutter body by means of setscrews. Accordingly, it is unnecssary to weld or braze any of the parts in place.

Abstract: A lathe for cutting wooden spindles comprising a rectangular pattern board on which is mounted a pattern spindle and which contains end slots for adjustably positioning the pattern board closer to the work spindle when it is desired to have a product relatively smaller than that of the pattern. Parallel to the pattern and work spindles, is a cutting unit support in the form of a track, also parallel to the spindles, on which is slidably mounted, a tool carrier housing which rigidly supports a tool carrier in the form of a carriage. The carriage is propelled in either direction on a screw-threaded rod parallel to the cutting unit support. At one end of the threaded rod, a handle is provided which drives a train of gears so as to turn the threaded rod at high speed in either direction. The other end of the threaded rod is provided with a handle for directly rotating the threaded rod at low speed.

Abstract: A reaming tool is mountable on the tooling carriage of a power driven threading machine for continuous motion displacement about two axes and between use and storage positions in which a reaming blade of the tool is respectively coaxial with a tubular workpiece to be reamed and supported laterally outwardly adjacent the tooling carriage. The reaming tool is comprised of an elongate arm carrying the reaming blade, and one end of the arm is mounted on the tooling carriage for pivotal movement of the arm about a first axis laterally offset and parallel to the workpiece axis and a second axis perpendicular to the first axis.

Abstract: A drill bit has a formation engaging face from which there extends a plurality of stud assemblies having a diamond cutting face thereon. Each of the stud assemblies are mounted within a socket by a close tolerance press fit. A reduced diameter rearwardly extending passageway leads from the rear of the socket back up to the face of the bit so that when the diamond face of the stud assembly becomes worn, a tool can be extended through the passageway to the rear of the socket and into contact with the stud assembly to force the stud assembly from the socket. The stud assembly is then rotated a few degrees to present a new cutting edge to the formation, and pressed back into the socket, thereby returning the drill bit to like new condition.

Abstract: A method for rough-turning and finishing a workpiece on a lathe wherein the lathe is provided with a tailstock center which is axially displaceable, a further center on the work spindle as well as axially displaceable front drivers and a chuck so that, for rough-machining, the workpiece is lifted off the work spindle center by means of the front drivers and driven by the chuck whereas, for finish-machining, the workpiece is held between the centers and driven by the front drivers.

Abstract: Disclosed is a cutting tool assembly having a hard, wear resistant insert, a shim and a blade body. The shim has a rearwardly extending recess for receiving the insert. The insert abuts against a top, bottom and rear portion of the shim recess. The shim recess tapers toward the open end of the shim recess to springingly hold the insert. The blade body has a downwardly and rearwardly extending recess on a first end for receiving the shim and insert. The blade body recess is also inclined to the longitudinal axis of the blade body. The blade body recess tapers toward the blade body so as to wedgingly hold the shim and insert.