Abstract: An adaptor is inserted between a cutting tool and a clamping section of a tool machine. The adaptor comprises a tool clamping part holding the tool, and an adaptor clamping part which is held by the machine. Between the two parts there is a bearing which controls the relative movement between the two parts in such a manner that this movements does not influence machined geometry, dimension or surface of the work piece machined by the tool, to any significant degree, and an elastic damping member which ensures that a possible relative movement between two parts is damped down to a desired degree. Possible vibrations in the tool are thereby kept down on a level where they do not contribute to amplify the normal sound pressure from the machining operation, and an efficient noise suppression is achieved.

Abstract: A rotary cutting tool such as an endmill includes a coating on its radial relief surfaces for enhancing damping of vibratory motion of the tool at speeds which permit the relief surfaces to rub on the workpiece being machined. The coating has a hardness substantially less than that of the remainder of the tool. In a preferred embodiment, the tool is made of tungsten carbide, steel, or ceremet, and the coating is aluminum or an alloy thereof, having a thickness of about 0.0015 inch for tools with cutting diameters of about 1/4 inch to about 1 inch.

Abstract: A cutter assembly for installation on the rotary discs of a concrete finishing/stripper machine includes a base member for mounting on the rotary disc of a machine, a cutter member carried on the base member having a plurality of interchangeable cutting edges selectively presentable to a cutting position, a guide channel for constraining the cutter element for movement relative to the base member between first and second positions, and a coil spring for urging the cutter member toward a first of the positions while permitting movement of the cutter element along a path away from the first position and toward a deflected position in response to forces applied to the cutter element caused by obstructions on the surface being finished. The compression or pre-load on the coil spring is adjustable for varying conditions. The entire cutter assembly is readily mountable onto the bottom of the rotating disc and channels thereof by wedges, making set up of the machine quick and easy.

Abstract: A draw tube adaptor for insertion into the draw tube of a lathe. The draw tube adaptor includes a sleeve, and carried within the sleeve are a series of bushings spaced apart from one another. The bushings have bores sized to accommodate the diameter of the stock to be worked, and are maintained in a spaced apart relationship by cylindrical spacers carried within the sleeve. These spacers space the bushings at desired locations throughout the length of the sleeve. A cap arrangement is provided on the sleeve to retain the cylindrical spacers and bushings within the sleeve.

Abstract: A centering device for rods fed to a lathe is designed to be arranged between a rod feeder outlet and a lathe inlet and comprises at least one centering unit (11) having a passage port therein to be run through by a rod to which it supplies lateral containment. The centering unit (11) comprises a first (14) and a second (15) sectors superimposed with each sector having a passage (16 or 17) therein. Linkage actuators (18,19) operable to move the superimposed sectors to change the superimposed quantity of the passages (16,17) therein and thereby the rod passage port.

Abstract: The present invention provides vibration damping method and apparatus that can damp vibration in more than one direction without requiring disassembly, that can accommodate varying tool dimensions without requiring re-tuning, and that does not interfere with tool tip operations and cooling. The present invention provides active dampening by generating bending moments internal to a structure such as a boring bar to dampen vibration thereof.

Abstract: A support and centering device for a fed bar, in a bar magazine for lathes, comprises a plurality of rods (11) supported at the ends by a first (12) and a second (13) support elements facing each other. The rods (11) are such arranged as to identify a passageway (19) for the bar internally of the plurality of rods and the support elements (12, 13) are mutually rotatable about the passageway axis (36) to tilt the rods (11) relative to this axis, thereby varying the transverse size of the passageway. The supports are spring urged against each other to provide a spring support to the bar and enable passage of a pusher of the bar magazine.

Abstract: Workholding apparatus for mounting a workpiece (6) on a machine tool, the apparatus comprising a diaphragm chuck portion (2) and a tailstock portion (4). The chuck (2) includes a backing ring (70) with face portion (74) attached to the diaphragm (44) with the backing ring (70) having a centering locator guide (76) for centering and stopping the axial advancement of a workpiece in the chuck (2). The chuck (2) also includes a support ring (106) including material (109) located at the periphery thereof for sealing the area between the chuck and the workpiece and dampening vibrations brought about by the machining process. The tailstock portion (4) comprises a rotatable tailstock support (112) having at least one workpiece seating surface (117). The tailstock includes a centering locator guide (114) extending axially from the tailstock support (112) and having a generally curved outer surface (115) for centering the workpiece in the chuck (2).

Abstract: A dampening apparatus for dampening vibrations of a workpiece during machining, the dampening apparatus having a dampener, a support to support and place the dampener in abutting vibration absorbing contact with the workpiece, and a dampener fixture for holding the dampener fixed relative to the workpiece. A pressure adjusting apparatus to adjust contact pressure between the dampener and the workpiece is preferably included. The dampener may further include a number of dampening rods supported by the plate at first ends of the rods and which in turn support dampening elements at distal second ends of the rods. The dampening elements may be lugs made of a resilient material such as rubber and the lugs may have flat surfaces for being placed in abutting vibration absorbing contact with the workpiece. The invention also includes a method of machining a thin web of a workpiece having an annular inner hub connected to a concentric annular outer rim by the thin web using the dampener.

Abstract: A bar feed assembly for receiving and guiding a bar stock to be machined in a lathe, comprises a tubular member for rotatably receiving and guiding the bar stock to be machined and a member for advancing the bar stock through the tubular members. A plurality of stabilizing bodies are provided along said tubular member in spaced apart relation and each has a compliant surface disposed in surrounding relation to the tubular member in a manner which permits axial thermal growth of the tubular members through the stabilizing bodies.

Abstract: A lathe includes an auxiliary transverse table at an opposite side to a transverse table. The auxiliary transverse table includes an auxiliary tool carrying an abrasive on one end thereof positioned at the opposite side to a machining tool of the transverse table. A workpiece is machined in a high straightness degree since the auxiliary tool of the auxiliary transverse table supports the workpiece on the opposite side to the tool of the transverse table which performs machining the workpiece. In addition, the machining time period as well as the number of machining processes on the workpiece can be reduced since the abrasive on one end of the auxiliary tool gives final touches to the workpiece during machining.

Abstract: An apparatus for prealigning hex or square stock sections before chucking in a collet. As hex stock advances, pre-alignment bushing provides general alignment. A plurality of spring-loaded veliers positioned within the prealignment collar slidably contact the flats of the stock along the path of travel and urges the stock radially to the proper alignment, so that the points of the stock do not hit the collet.

Abstract: An apparatus for dampening vibration during machining of a rotating sleeve. The apparatus includes a base disposed interiorly of the sleeve at a selected location along the sleeve longitudinal axis. The base is spaced from the sleeve. The apparatus also includes a member mounted radially movable on the base. The member is adapted to move radially into contact with the sleeve interior surface in response to the sleeve being rotated during machining thereof so as to dampen vibration of the sleeve.

Abstract: In a machine tool having a base member, a moveable member and a drive screw assembly for displacing the moveable member relative to the base member, an anti-whip device for the drive screw assembly generally consisting of a support member mounted on the base member and displaceable between a first position supporting an elongated drive screw, and in a path of travel of the moveable member and a second position not supporting the drive screw and out of the path of travel of the moveable member, yieldable means for biasing the support member into the first position and means disposed on the moveable member and engageable with the support member for camming the support member from the first position to the second position against the biasing action of the biasing means when the drive screw is driven and the moveable means is caused to traverse past the support member.

Abstract: A machine tool having a stock holding and supporting grip which is spaced from the stock clamping chuck and which provides an equally applied gripping pressure at circumferentially spaced locations about the stock, preferably applied by hydraulic gripping elements. The grip accommodates eccentricities and deviations in the stock, and prevents increase in such eccentricities during rotation of the stock during machining which would otherwise arise due to centrified forces acting on the protruding tail of the stock, thus preventing bowing and whipping of the unworked tail and of the stock while machining.

Abstract: A material holding and guiding device of automatic lathe has a base with one end provided with an arm frame and another end provided with a reciprocating set. A receiving and retaining set is mounted pivotally on the arm frame in a manner that the bottom of the receiving and retaining set is coupled with the reciprocating set. The receiving and retaining set has an inner annular body and an outer annular body. The inner annular body is axially provided with a through hole which is used to accommodate therein the material to be lathed and which is provided at each of two ends thereof with a ring sleeve. The motion of the reciprocating set causes the receiving and retaining set to make a swing of a predetermined angle so as to force the ring sleeves located at both ends of the through hole of the inner annular body to hold the material stably in a manner that the material is capable of turning synchronously with the inner annular body.

Abstract: A device for dampening the vibration of a rotating disc during the machining of the faces thereof has a spring member having a wide base portion and two arms extending from the ends of the base. At the face end of each arm is a pad mounted to pivot about an axis perpendicular to the axis of the arm. A dampening device in accordance with this invention has eye shields without requiring that the eye shield be removed.

Abstract: The feeding apparatus has a holding plate (15) which is provided with passage bores (18) for the accommodation and mounting of the rear end of the guide tubes (12) of the turning machine. The holding plate (15) is mounted on a supporting frame (16) for rotation about the central axis of the spindle drum of the turning machine. On the side of the holding plate (15) facing away from the spindle drum there is a cover plate (26) which is coupled non-rotatably to the supporting frame (16) and which is sealed against the holding plate (15). Between the holding plate (15) and the cover plate (26) is a distribution passage (38) with which on the one hand the openings of the guide tubes (12) are in communication and to which on the other hand a damping fluid feed line is connected.

Abstract: The invention is directed to a brake lathe having a device to eliminate or reduce vibration. Various types of dampers may be mounted on the arbor shaft of the lathe.

Abstract: A bar stock support comprises a tubular member with resilient means extending radially inwardly from the inner wall of said tubular member toward the major axis of said tubular member to define a generally cylindrical channel having a diameter smaller than at least the largest cross-section dimension of the smallest said bar stock to be supported, so that at least some of said resilient means is deformed by said bar stock. Said resilient means has sufficient resistance when deformed to support said bar stock generally concentrically within said tubular member and to resist movement of said bar stock radially within said bar stock support. In a preferred embodiment, said resilient member comprises a helix of bristles disposed within said tubular member.

Abstract: The device comprises a box-like body inside which two shoes are slideable and are actuated in opposition. A shoe is compsed of a plate which has a guiding opening for a gib of the other shoe. Brackets are rigidly and protrudingly associated with the top of the gib and with the lower end of the plate and bear respective jaws which are adapted, in jaw closure position, to define a guiding duct for a bar and, in opening position, a passage for the bar-pusher. The opposite actuation of the shoes is actuated by a shaft controlled by a fluidodynamic jack having arms which bear wheels acting between the bracket supported by the gib and a protrusion of the plate.

Abstract: A bar stock feed mechanism includes a filler tube having provision for coaxial alignment with an attachment to the rotatable work receiver of a lathe, for example, and is adapted to coaxially receive a section of bar stock for incremental feeding to the chuck of the lathe. The tube, at its end portion axially remote from the chuck contains a piston adapted to abut the proximate end of the bar stock, and the piston is pressurized for advancing the stock. Filler tubes are provided in several diameters for accommodating several sizes of bar stock. In the event of bar stock of substantial length, the filler tube is surrounded by a concentric extension tube which rotates with the tube and chuck or equivalent work receiver of the machine or lathe.