Abstract: A machining unit for use in a machine tool comprises a slide base support mounted on a base of the machine tool, a slide base located above the slide base support, and a device slidably mounted on the slide base for working a workpiece. Link members are pivotably attached to the slide base support and the slide base to constitute a quadric link mechanism. The quadric link mechanism is operated by a hydraulic cylinder-piston assembly swingably secured to the slide base support. The machining unit may further comprise a member attached to the slide base support for positioning and supporting the slide base so as to maintain a predetermined inclination thereof with respect to the horizontal.

Abstract: A tap for cutting threads in a hole which comprises a semi-circular tap body with threads cut in the circular surface extending to a diametrical surface. Modified embodiments include a rake angle at the cutting ends of the tap threads and a drill point to allow the device to serve as a drill and tap.

Abstract: For use with an indexable metal cutting tool, an improved holder assembly is disclosed which functions to maintain the position of an indexable insert during operation of the tool. More particularly, a holder assembly is described which includes a support member, connected to the cutter body of the tool, which includes a platform and a threaded aperture disposed normal to the plane of the platform. The latter includes a plurality of keys extending from the plane of the platform. A planar indexable insert having an aperture disposed normal to the planar surfaces thereof is disposed in abutting relationship with the platform of the support member, such that the apertures therein are in register. In addition, the planar surface of the indexable insert which is in abutting relationship with the platform includes receiving grooves which are adapted to be interengaged with the keys of the support member.

Abstract: An apparatus for the out-of-round circumferential machining of workpieces includes a tool holder, a tool bit carried by the tool holder and a motor having a rotor operatively coupled to the tool holder for a radial feed of the tool bit. The motor can be numerically and electronically controlled dependent upon a desired out-of-round contour of the workpieces. The moment of inertia of the tool holder, the tool bit and any other component moving with the tool holder as a unit during feed motion is at the most equal to the moment of inertia of the rotor.

Abstract: A cutting tool for machine tools which has a coolant pipe within the clamp holder, a covering over at least a portion of the clamp holder with a space between the clamp holder and the covering, and coolant outlet holes from the pipe to the space. This provides efficient cooling of the cutting tool without allowing the coolant to come into direct contact with the cutting plate.

Abstract: A cutting tool is provided with cutting elements being arranged in continuously recurrent groups comprising three or four cutting elements. These cutting elements are arranged in different distances (A, B, C, D, E, F, G) to each other which distances shall be within certain determined limits.

Abstract: In the method of upholstering a couch or a chair having a hollow frame with a front rail, a series of rows of coiled springs mounted upon and projected above the frame and parallel to the rail, and an edge wire extending tangent and connected to the top coils of the row of springs adjacent the rail, including the step of tying the springs of the other rows together, and to the row of springs adjacent the rail and to the frame; the improvement which comprises the preliminary step before tying the springs of selectively mounting, spacing and securing a plurality of upright edge wire clamps to and along the rail outwardly thereof. Each clamp includes an upright support having an adjustable edge wire retaining block thereon with a depending edge wire retainer. Further steps include selectively adjusting the edge wire retaining blocks on each clamp to a predetermined height with the corresponding edge wire retaininers longitudinally aligned and retainingly engaging the edge wire.

Abstract: A milling cutter which is adapted to be rotated about a central axis includes at least one insert pocket having opposed leading and trailing walls, as well as a rear wall. An indexable insert having front and rear planar surfaces is receivable in the insert pocket, along with at least one locking wedge, which is interposed between the insert and the pocket walls for securing the insert within the pocket. In accordance with the subject invention, an adjustable locating wedge is provided for regulating the axial location on the insert. The locating wedge, a portion of which is disposed in abutting relationship with the axially lowermost cutting edge of the insert, is received within a groove located in the rear wall of the insert pocket. The receiving groove is aligned with the insert and extends radially inwardly from the periphery of the cutter body.

Abstract: A tool-head supporting structure having a hollow saddle reciprocally mounted on parallel ways surmounting a bed which is provided with a top portion that structurally directly interconnects the ways and provides a flat surface on which metal chips and the like created by the machining operation can collect ahead of the saddle. The forward feed motion of the saddle is limited by a fixed stop which is mounted on the bed beneath the saddle where, for all practical purposes, it is tamper free. Access is had to the stop for servicing or replacement when necessary through an opening in the front of the saddle, and the access opening normally is closed by a removable plate on which is mounted a wiper that pushes chips ahead of the saddle into a suitable chip trough and disposal system, whereby to prevent the chips from inadvertently lodging and accumulating around the stop and interfering with proper forward positioning of the saddle which in most if not all instances must be precise.

Abstract: A ring gear burnishing machine is disclosed that has a pair of burnishing stations in which ring gear workpieces are burnished in an overlapping cycle that minimizes burnishing time. Each burnishing station consists of a support table which is coupled to an air cylinder spring and is vertically displaceable so that a burnishing gear is placed on the support table when it is in its lowered position, and burnishing takes place when the support table is in its raised position. Burnishing is accomplished by a pair of burnishing gears at each station. One of the burnishing gears of each pair is driven and the other burnishing gear of the pair is an idler gear. A gear engagement mechanism that includes a pivotable support holder and a pair of rollers which engage the periphery of the ring gear is designed so that the rollers, which do not distort the ring gear, push it into mesh first with one of the rotating burnishing gears, and then with the other burnishing gear of the pair.

Abstract: A machine tool, particularly a lathe, milling machine or boring machine, having a machine bed on which a slide and/or tailstock is displaceably guided by means of at least one prism-shaped guideway. The guideway is formed by a guide bar which, as seen in cross-section has guide surfaces lying in pairs parallel to and opposite each other and which guide bar on a part of two adjacent of the guide surfaces is fastened in a prismatic recess in a machine bed. The slide or tailstock is displaceably supported on the guide bar via prismatic travel surfaces by means of the two other guide surfaces. A guide gib which is removably fastened to the slide or tailstock acts on the free part of the two adjacent guide surfaces serving for the attachment.

Abstract: An improved throw away insert is disclosed which can break chips satisfactorily in cutting by use of a large part of the cutting edge. It is provided with a large chip breaker projection and a plurality of small chip breaker projections disposed between each nose portion and the large projection.

Abstract: A spring actuated, pivoting cutting tool, which is used in conjunction with turning equipment and which at the termination of its cutting stroke automatically lifts the cutting edge off the finished surface to allow the tool to be withdrawn without leaving a return mark, is provided with a spring actuated, slidable shield which substantially covers any gap between the moving parts of the cutting tool, thus reducing the likelihood of chips or other debris from lodging between the moving parts of the tool and preventing its proper operation.

Abstract: The present quick-change mandrel for attaching a hole saw to an electric drill has different sized oblong locking segments at its front end which match the usual oblong openings in the back of different sized hole saws. The hole saw is slid rearward over the corresponding locking segment and then is turned in peripheral grooves in that locking segment to engage behind rearwardly-facing shoulders on the locking segment. The reaction force on the hole saw when it is cutting into a workpiece forces it more tightly in the grooves.

Abstract: To reduce the requirement for stocking different types of holder plates for cutting chips 9, at least the chip holder plate 16 carrying the radially outermost chip, and the next adjacent chip holder plate 6 carrying the radially more inwardly positioned chip, have mutually engaged common abutment surfaces 19, 27. The tool body 1 is formed with a recess 5 in which the radially outermost chip holder plate and the next adjacent plate are commonly secured, for example by clamping bolts or screws extending inwardly into the tool body at an angle with respect to the tool body axis 26. All of the radially inwardly positioned chip holder plates 6 are of equal size and shape. The boring or drilling diameter of the tool is defined by the width of the radially outermost chip holder plate and the chip positioned thereon.

Abstract: A lathe type piston turning machine wherein a single point cutting tool is controlled simultaneously by two separate cams to generate a desired contour on a piston which varies in both radial and axial cross section.

Abstract: A power drawfinger system for selectively locking and releasing a toolholder or arbor in the socket of a power driven machine tool spindle. The system includes a collet device actuated by a power drawbolt using hydraulic means for expanding said device and a resilient member for contracting same to disengage or engage the toolholder. The collet device and drawbar mechanisms are constructed to be fail safe in event of breakage of the collet or loss of power.

Abstract: A link is pivotally connected at one end to the collar which is clampingly engaged with the quill of a machine tool. The other end of the link is pivotally connected to one end of a lever arm. At an intermediate point, the lever arm is engagable with a conventional sensitive drill adapter held in accordance with conventional practice by the machine tool. The drill adapter is reciprocally movable in response to movement of the lever arm.

Abstract: A rotary cutting tool having a cylindrical body with a plurality of flutes and a cutting tool insert mounted at the end of each flute adjacent the body cutting portion end face. The cutting inserts are mounted so that insert first cutting edges are spaced slightly axially outward of the tool body and extend at least generally radially thereof. A coolant flow passage extends coaxially through the body and includes radial branches communicating with the inserts. Preferably, the coolant flow passage is open at the body cutting portion end face and the branches comprise grooved areas in the end face. Each insert includes a coolant flow channel therein extending adjacent to and coextensive with the first cutting edge. An entrance area for these channels communicates with an associated one of the branches. In the preferred arrangement, each insert includes first and second cutting edges with the second cutting edges being slightly spaced radially outward of the cutting tool body.

Abstract: Hand-held scraper includes a body or holder portion to which is removably secured a scraping or cutting blade. The blade is retained in place by camming the mounting tabs at its respective ends into tight frictional locking engagement with a pair of longitudinally spaced apart retaining ribs protruding downwardly in opposite outwardly disposed directions from the underneath side of the holder portion. At least one of the retaining ribs is somewhat flexible to facilitate camming of the blade into and out of assembled engagement with the holder portion with little or no flexing of the mounting tabs and no bending or yielding of the blade body whatsoever. To facilitate removal and replacement of the blade, a movable lever is provided on the underneath side of the holder portion inwardly of one of the mounting tabs. When the lever is manually pushed downwardly, the lever presses against such mounting tab, causing it to cam away from the associated mounting rib thus freeing the blade from the holder.