Abstract: A control device for feeding metal bars to a multispindle automatic lathe comprises a rotating drum which bears a plurality of bar pushers arranged peripherally and equidistantly from each other, control means being associated with said bar pushers. In accordance with the invention said control means consist of a hydraulic motor for each bar pusher, said motor being fixed to said rotating drum. Fluid under pressure is fed selectively to at least one or more of said hydraulic motors, depending on the feed requirements, through a unit which comprises a distributor designed to place in communication fluid delivered under pressure with said at least one or more motors during rotation of the drum to which it is constrained.

Abstract: An elongated rod member supporting apparatus is disclosed which is provided in a rod feeding machine having a frame positioned adjacent a working machine. The apparatus rotatably supports the elongated member and feeds the same to the working machine. The apparatus comprises a plurality of rod supporting units, damper means and oil supplying means. The plurality of rod supporting units are each positioned spaced away and are arranged along a length of the rod feeding machine. The unit has both axial end portions provided with bearing portions for rotatably supporting the elongated member. The damper means is provided between each of the rod supporting units and the frame of the rod feeding machine for elastically supporting the rod supporting units. The oil supplying means is provided for supplying oil to each space defined between the bearing portions and the elongated rod member.

Abstract: The present invention relates to a bar guiding device for bar feeders of machine tools. The device is composed of at least one group of wheels angularly distributed around the bar and rotatably supported so as to be peripherally in contact with the bar.

Abstract: The multiple-channel guiding device for bar-loaders of automatic machine tools comprises an elongated body, peripherally defining a plurality of grooves with different diameters and being rotatable about its own longitudinal axis so as to move one of the grooves to a loading position aligned with the work axis of the machine tool; a plurality of covers co-operating with the grooves so as to define, in their closure position, respective guiding channels for the bar to be machined, the covers being openable to insert the bar; a chute for inserting the bar in the guiding channel arranged in loading position; a bar pusher element slidably actuated inside the channel to advance the bar toward the machine tool.

Abstract: A method of forming a beaded transfixion wire for orthopedic uses. The beaded transfixion wire includes an elongated wire formed of an implant grade material. A bead is provided on the elongated wire intermediate the opposite ends thereof. The bead extends outwardly beyond the outer surface of the elongated wire and is integral therewith.In forming the beaded transfixion wire the solid bar stock is rotatably fed past a cutting tool to turn down a portion of the bar stock to a selected daiameter to provide a first portion of an elongated wire. The first portion of the elongated wire is fed into a tube for stabilizing the first portion against any whipping motion. The solid bar stock is continued to be rotated past the cutting tool while at the same time a bead is profiled from the solid bar stock with the cutting tool.

Abstract: An apparatus comprising a plurality of support members 6 mounted on a rail 5 and movable longitudinally of the rail, a housing 7 mounted on each of the support members 6 and rotatable about a support shaft 22 perpendicular to the length of the rail, and a contact ring mounted on the housing and rotatable about an axis perpendicular to the support shaft 22. An elongated material 31 is inserted through the contact rings 8 and rotated about its longitudinal axis as positioned longitudinally of the rail 5. The angle of inclination of the rotational axis of the material 31 relative to the axis of rotation of each contact ring 8 is variable by rotating the housing 7 about the support shaft 22.

Abstract: An elongated rod member supporting apparatus is disclosed which is provided in a rod feeding machine having a frame positioned adjacent a working machine. The apparatus rotatably supports the elongated member and feeds the same to the working machine. The apparatus comprises a plurality of rod supporting units, damper means and oil supplying means. The plurality of rod supporting units are each positioned spaced away and are arranged along a length of the rod feeding machine. The unit has both axial end portions provided with bearing portions for rotatably supporting the elongated member. The damper means is provided between each of the rod supporting units and the frame of the rod feeding machine for elastically supporting the rod supporting units. The oil supplying means is provided for supplying oil to each space defined between the bearing portions and the elongated rod member.

Abstract: An arrangement for mounting a power-operated clamping device for workpieces or tools on a hollow machine-tool spindle in which is disposed a securing rod that is adapted to be coupled with a drive member of the respectively mounted clamping device, and that is adapted to be actuated by a hydraulic or pressurized cylinder secured to the rear end of the spindle. Secured to a flange on the front end of the spindle is an intermediate ring to which the body of the clamping device is adapted to be secured via at least two securing pins. To provide a structurally straightforward design that requires no additional pressure medium cylinder, the securing pins are secured to the clamping device body and are axially oriented, with each securing pin being provided with a notch that has a tightening surface. Key rods are displaceably guided in the intermediate ring, with each key rod having a key that is introducible into a respective notch of the securing pins.

Abstract: A bar puller is provided having adjustable jaws comprising fingers made of a resilient material. The fingers extend forward from a housing adapted to be mounted at a tool station of a computer numerically controlled lathe having a turret. Front and side guiding surfaces are provided on the ends of the fingers to cause the jaws to deflect outwardly and grip a bar when forcibly engaged therewith. The lathe chuck releases the bar allowing the bar puller to withdraw the end of the bar a desired distance out of the chuck. The chuck is closed while the turret continues moving away from the chuck causing the bar to be withdrawn from between the jaws of the bar puller, readying the machine for its next cycle.

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: The device for controlling the facing of a bar on an automatic lathe for machining bars, comprises a bar-pusher actuated by a traction element to cause the advancement of a bar towards the lathe, a carriage slideable on a guide parallel to the traction element, a hook for intercepting the carriage in a bar loading position, a clutch adapted to keep the bar-pusher rigidly associated with the carriage when the carriage is free to slide on the guide and to allow the bar-pusher to move with respect to the carriage when the carriage is intercepted. The hook is controlled by a sensor adapted to detect the end of a bar to be machined at the entry point of the lathe and to control the hook during free sliding of the carriage. A further sensor is provided to actuate the bar-pusher in the bar facing position.

Abstract: The device comprises a sectional carrier of closed cross section with a circular bed, a base and channels of distribution and return of oil. A guiding element comprising at least one guiding tube enclosing a bar stock to be machined and a push-piston is removably secured on the bed. The distribution channel communicates through radial openings with the guiding element for delivering to the latter oil under pressure which creates a hydrodynamic bearing supporting the bar stock when the latter is set into rotation by the head stock of the lathe. The sectional carrier has a great rigidity and stability which permits very high speeds of rotation of the bar stock to be machined. The return of oil by closed channels of the sectional carrier is protected against external contamination by impurities or dust.

Abstract: A plurality of bar stock retaining sleeves control the bar stock fed therethrough to a machine center to prevent excessive vibration and end-whipping during a cutting and machining operation. A first retaining sleeve is positioned within the feed orifice of the machine center, and includes a master bushing having an inner diameter substantially equal to the outer diameter of the bar stock being cut, which master bushing is positioned adjacent the orifice outlet at the the cutting head. A second retaining sleeve is supporting exteriorly of the machine center in abutting relationship to the stock inlet of the feed orifice. The second retaining sleeve includes at least two bushings having an inner diameter substantially equal to the outer diameter of the bar stock, the two bushings being connected in spaced relationship to each other by an elongated cylindrical tube having an inner diameter greater than the inner diameter of the connected bushings.