Abstract: A cutter head assembly and method of assembly design for use with a continuously indexing gear cutting machine is described as including slots formed through the face of said assembly of particular orientation for receiving cutting tools characterized by their front faces requiring no resharpening. The assembly is adaptive to cut a range of job requirements while preserving the front face portion of the cutting tools.

Abstract: A bar puller mounted at a tool station on the turret of a numerically controlled turret lathe has opposing reversible, self-centering jaws biased toward each other and to a centered position for general alignment with the projecting end portion of a bar held by a rotary chuck mechanism, which comprises part of the lathe. The jaws receive and grip the projecting end portion of the bar therebetween when the bar puller is forced into engagement with the projecting end of the bar by movement of the turret. The bar puller may be adapted for mounting at either a boring or turning tool station on the turret. The jaws are adjustably positionable to receive and grip bars of differing size.

Abstract: Work-rest for use primarily with machine tools, provided with a prehensile, selfcentering, automatic and double-acting equipment. This equipment is composed of a tern of rollers, whose centripetal simultaneous displacement, that assures the coaxiality of the workpiece, is realized by a pair of symmetrical double-acting grooves made on interchangeable lever arms whose angular movement is enslaved to the axial sliding of a central push rod double acting, grasping and expanding. The interchangeability of the arms of the double-acting prehensile equipment makes possible the use of only one work-rest body for a larger dimensional range of workpieces, both from the outside and from the inside with a considerable saving of operating cost.

Abstract: A milling cutter including a supporting body having a longitudinal axis and presenting a frontal face and a circumferential side. The supporting body is provided with a radial recess. A plurality of cutting plates are disposed along the circumferential side and arranged in rows each extending generally in the longitudinal direction of the supporting body. At least one of the cutting plates is a face cutting plate having a cutting edge for cutting at both the circumferential side and at the frontal face. The cutter includes a cassette having a quadrilateral cross section and disposed in the recess. The face cutting plate is fastened to the cassette, and at least one fastening element is provided for releasably tightening the cassette in the recess.

Abstract: A dynamically stiffened rotary tool construction is disclosed. The preferred stiffening means are a pair of spaced, adjustable, rotatably-mounted cam followers.

Abstract: A reciprocative apparatus individually folds a plurality of thin, limp, sheet-type articles, such as sandwich bags, and loads them into a carton. The apparatus includes a delivery assembly for sequentially transferring the bags from a conveyor belt to a folding station. A pivotally operated swatter is employed in the delivery assembly which includes a swatter driving mechanism which gradually decelerates the swatter near the end of its forward movement to minimize article wrinkling.

Abstract: A numerically controlled machine tool comprises a tool movable into engagement with a workpiece, means for generating a first signal being a measure of the distance between the tool and a datum surface provided on a relatively fixed part of the machine, a first closed loop system adapted to move the tool toward the workpiece and having the first signal as feedback, means for generating a second signal being a measure of the distance between the tool and the workpiece, a second closed loop system (33) having the second signal as feedback, and means responsive to the second-mentioned distance attaining a threshold value, while being moved under the control of the first system, for changing control of the tool movement from the first to the second system.

Abstract: This disclosure relates to improvements in a slitter device which cuts a roll-shaped long piece rotatably supported almost horizontally by a guide holder rod into round slices with the predetermined width using a rotary cutting blade which moves back and forth perpendicular to the long piece, and more particularly to the safety control of the slitter device which immediately stops the rotation of the cutting blade or retracts the cutting blade from the guide holder rod or uses other methods when the rotary cutting blade contacts the guide holder rod.

Abstract: A lathe has two tool units for machining a workpiece from both end faces, and a workpiece-gripping drive stock disposed between the two tool units. A single chuck is supported on the drive stock and includes a series of radially displaceable gripping members and two coaxial rings rotatable relative to each other for actuating the gripping members, an outer one of the rings serving as a pulley for a driving belt whereby the outer ring is driven and each one of the two rings having an annular series of coupling teeth at one end face thereof. Two devices for respectively loading and unloading the workpiece each comprises a carrier carrying coupling teeth, the coupling teeth of the two coaxial chuck rings being movable into mesh with the coupling teeth of said devices, the coupling teeth carrier of only one of the devices being rotatable and a motor being connected to the rotatable carrier for rotating the carrier.

Abstract: A tool assembly comprising a support base having a plurality of longitudinally oriented guideways disposed next to one another in a common clamping plane and at least one tool holder which is adjustably mounted along the guideways and can be secured in the guideways by clamping means, characterized in that the guideways are formed by a plurality of rib-like projections in the base defining a series of grooves arranged in at least two groups at each end of the support base and the clamping means are formed by at least one holding projection of the tool holder which engages in a groove of the two groups whereby the holding projections of the one group and the holding projections of the other group are arranged mutually adjustable to one another by adjusting means against the sidewalls forming the grooves in the base.

Abstract: A skiving and roller burnishing tool includes a plurality of frustoconically tapered rollers and a retractable knife for use in combination for finishing the internal surface of a cylindrical hole. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. The rollers are arranged about the outer surface of the race for rolling engagement with the internal surface of the hole. The smaller ends of the rollers face forward, and the taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis of the race. The rollers are biased in the forward direction using a roller pusher with a chosen force so that the force exerted on the internal surface of the hole remains constant over a range of sizes of the hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion.

Abstract: This tool is used to reface the filler necks of the radiators of coolant systems of Caterpillar equipment. Primarily, it includes a circular plate, having a number of radial cutting blades secured to it. It also includes a sleeve, for being received on the stud within the filler neck, and it further includes bolts for receiving a wrench to rotate the tool, and a depth control bolt is included, for adjusting the depth of cut of the blades of the device.

Abstract: A special purpose lathe apparatus, especially adapted for machining automotive components, such as brake drums and discs, is disclosed. The lathe includes a housing rotatably supporting a workpiece spindle driven by an electric motor. A pair of substantially identical tool slide modules are mounted on the housing at right angles to each other. Each slide module has a slide element which is movable selectively manually by a handwheel or automatically by a servomotor independently of the spindle drive motor. Only one servomotor is operable with the drive motor at any time.

Abstract: A cutting tool for improved material removal efficiency at relatively high feed rates is disclosed. In a preferred form of an indexable polygonal cutting insert, an edge land and chip contacting ramp surfaces in at least a top face of the insert are advantageously arranged for reduced cutting forces and friction, ample cutting edge strength and inducement of free chip flow. In order to overcome deleterious chip convergence and resultant high pressures in the vicinity of the nose radius of the cutting corner of the insert, a recessed control surface is positioned in each corner portion of the polygonal insert.

Abstract: A safety tool rest for a lathe having a rotating workpiece is disclosed. The tool rest includes a generally planar base which is attachable to the lathe. An elongate flange projects upwardly and outwardly from the base and has an upper edge which is disposed adjacent the rotating workpiece. A tool for cutting the workpiece rests on top of the upper edge of the flange. An elongate bar is attached to the base but is located above the base at a height higher than the upper edge. In this manner, the tool is inserted below the bar and over the upper edge for cutting the workpiece. The tool is prevented from being flipped about the upper edge during contact with the rotating workpiece by the bar. Preferably, the bar is vertically adjustable relative to the base to accommodate different sized tools. This adjustment is provided by two threaded bolts which pass through the bar and engage the base. A spring is provided around the bolts to urge the bar away from the base.

Abstract: The invention relates to an apparatus for manufacturing a three-dimensional, shaped graphite electrode (3) utilizing a three-dimensional, shaped file (4), moved toward one another (filing stroke) while executing an orbital relative movement between the shaped file and the three-dimensional, shaped electrode blank until such time as the contour of the three-dimensional, shaped electrode corresponds, with tolerance, to a negative copy of the contour of the shaped file. During the filing process, graphite particles filed off by the shaped file are flushed out of the working gap (7) formed between the shaped file and the three-dimensional, shaped electrode with the aid of a flushing fluid.

Abstract: A composite article and cutting tool are prepared by densification to form a body consisting essentially of particles of hard refractory material uniformly distributed in a matrix consisting essentially of a first phase and a second phase, said first phase consisting essentially of crystalline silicon nitride and said second phase being an intergranular refractory phase comprising silicon nitride and a suitable densification aid selected from the group consisting of yttrium oxide, zirconium oxide, hafnium oxide and the lanthanade rare earth oxides and mixture thereof.

Abstract: A thrust bearing has a curved surface machined therein by a cutter which is positioned by a cam as the bearing is rotated. The cam causes the cutter to pivot so that a sloped cut is made rather than a conventional planar cut.

Abstract: A milling cutter for clamped cutting inserts (12) which are held in position by means of a clamping means (14), which rests against the cutting insert (12) at a first contact surface (17) and against the cutter body (10) at a second contact surface (24). In order to obtain a large chip pocket by means of a clamping means (14) having short radial extent the clamping means is designed such that the distance between the first contact surface (17) and a supporting surface (21) for supporting the cutting insert is larger than the distance between the supporting surface (21) and the second contact surface (24).

Abstract: An adjustable mandrel for securing a portable lathe adjacent the end of a pipe to be prepared for welding includes a lathe support plate that is adjustable about a single miter axis relative to the body of the mandrel which is arranged to engage the I.D. of a pipe. The portable lathe is connectable to the support plate by means of a mandrel engaging fixture that enables the cutting plane of the lathe to be located adjacent the pipe end. The miter axis of the mandrel is always located so that it lies in a direction that is parallel to the cutting plane of the portable lathe. The miter angle can be set within a range of positions so that the pipe end can be cut at a precise miter angle in preparation for welding to another pipe section.