Abstract: An extruder for extrusion manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.

Abstract: A coupling system between a tool system module, such as, for example, a tool receptacle, and a machine tool, such as, for example, a spindle. In order to provide for rapid initiation and release of the connection between these components while making large axial forces available, this incorporates a clamping system with an operating rod, by means of which a wedge drive is controlled, with which clamping elements that are provided in one of the parts that are to be coupled can be forced essentially radially outwards into suitably configured recesses in the other part that is to be coupled.

Abstract: A coupling system between a tool system module, such as, for example, a tool receptacle, and a machine tool, such as, for example, a spindle. In order to provide for rapid initiation and release of the connection between these components while making large axial forces available, this incorporates a clamping system with an operating rod, by means of which a wedge drive is controlled, with which clamping elements that are provided in one of the parts that are to be coupled can be forced essentially radially outwards into suitably configured recesses in the other part that is to be coupled.

Abstract: The invention relates to a extrusion die tool for producing a hard metal or ceramic rod with at least one twisted internal bore (14). The nose (3) of the nozzle (2) has a smooth cylindrical channel (4). A bearer (6) is fitted coaxially inside the nozzle (2) which has a plurality of elastic threads (9) and/or channels or bores corresponding to the desired number of internal bores for the thread-shaped pressing of a plastic material into the extruded material. The bearer (6) and the nozzle nose (3) are rotary, i.e. they rotate about their longitudinal axes. The pitch of the twisted internal bores (14) produced is thus determined by the rotation speed of the thread bearer (6) and/or the nozzle nose (3) and the rate of flow of the extruded material. Rod blanks with high-precision helical internal bores (14) can thus be produced.

Abstract: A coupling for a detachable, torsionally and axially rigid fixing of parts, in particular of tool components, at corresponding carrier members, such as a tool base receiver or basic holder. At the carrier member a receiver for a conical or cylindrical centering extension of the part is provided. A chuck member can be actuated by a set screw from the exterior of the part so as to force the two members against each other through a support ring surface pairing. In order to provide an easy handling, a favorable application of force between the parts and compatibility with already existing coupling systems having a centrally disposed drawbar, the chuck member includes three clamp-like chuck claws positioned a circumferential distance with respect to each other which are disposed or arranged each in an axial plane of the coupling. The chuck claws are supported by an anchor portion at a shoulder in the receiver and are movable into an undercut interior recess with a radially outwardly projecting clamping portion.

Abstract: Described is a boring tool cooled from within made of a tool spiral and a clamping cylinder. The tool spiral is received in an interlocking way in a recess of the clamping cylinder and is supplied with coolant over its proximal end, which lies in the recess. The tool spiral (4; 44; 74) is received in a spring chuck (12) which, on the side facing away from the clamping cylinder, carries a drive disk (22; 62; 92) that engages in an interlocking way into the grooves. Further, the chuck body (14) has a central internal thread (26) in which an adjusting screw (24) having a central recess (32) is provided, an adjusting screw (24) against which the tool spiral under sealing of its coolant channels (8; 48; 78) can be pressed against the inner space (34) of the spring chuck (12). Tool spirals consisting, for example, of hard metal can be used more economically in this way.

Abstract: A coupling between a tool head and a tool support exhibits, for rough positioning, a holding fixture pin connection. By at least one fastening bolt running in the axial direction of the tool support, the tool head is braced against the tool support. In doing so the fastening bolt engages through a first screw coupling with the tool head and through a second screw coupling with the tool support. The first and second screw couplings exhibit synchronized threads of differing pitch so that, when tightening the fastening bolt, the tool support and the tool head are braced against each other in the axial direction. Further, the fastening bolt exhibits a centering section which, in the assembled state of the coupling, centers the tool head relative to the tool support. The fastening bolt, in the assembled state of the coupling, is received in its entirety in the inside of the unit formed by the tool support and the tool head and is accessible only through a borehole.

Abstract: Described is a coupling device between a workpiece support or a tool support, such as for example a tool system module, for example in the form of a basic tool holding fixture, and a handling device, such as for example a machine tool, especially a spindle. For rapidly producing and releasing the connection between these components while making high axial forces available, a clamping device with an operating rod is provided by which a key mechanism is controlled, with which clamping elements provided in the part to be coupled can be pressed essentially radially outward into a suitably shaped recess on the other part to be coupled.

Abstract: Described is a coupling system for cutting shank tools with which a stationary connection can be produced between coaxial parts of the shank tool in the direction of rotation and in the axial direction. The coupling system includes a holding fixture formed in a first part for a centering extension provided on a second part to be connected, a drive device, and a clamping device which can be actuated externally by an adjusting device and with which both parts can be pressed against each other through a prop ring surface pairing. The clamping device includes a connecting rod that is mounted symmetrically like a pendulum in the first part and that extends into a coaxial recess in the second part and forms a conical section there, through which the connecting rod can be placed under tension by the adjusting device braced on the second part. This generates pure axial tension which can be introduced, through a large, ring-shaped flat brace, without transverse force into the shank parts to be coupled.

Abstract: A cutting tool is described which comprises at least one exchangeable cutting blade mounted on a parallellepiped cutting blade holder which in turn is adapted to be fixed by a setscrew at a tool body. The setscrew passes through the cutting blade holder such that the holder is pressed flat against a first recess surface and, at the same time, in the direction of a second recess surface extending at an angle with respect to the first one, the setscrew penetrating the cutting blade holder with clearance for freely adjustable fastening such that it includes an angle of substantially the same size with both recess surfaces and presses the cutting blade holder against the second recess surface by two adjustable support members of which at least one is designed as a rotatable eccentric pin the axis of which extends substantially parallel to the associated second recess surface and which is supported in a fitting recess of the cutting blade holder or of the tool body.

Abstract: A drill having two or more cutting edges is provided with interchangeable cutting members. The cutting members are fastened by screws in corresponding recesses formed in the drill bit. The cutting members are embodied by interchangeable plates and provided with fastening portions behind the main cutting edge, in the direction of cutting. The screws engage through these fastening portions in threaded bores formed in the front face of the drill bit.

Abstract: A drill is described having a metal bit carrier part on which a sintered metal bit is placed. The bit possesses at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier part. This drill is particularly characterized by very great mechanical and thermal stability, which is not adversely affected in any way by the system of cooling channels in the interior of the drill, so that the service life and cutting power of the drill can be greatly increased. These advantages apply both to twist drills proper and to single-lipped deep-hole drills, for which there is the particular advantage that the geometry of the drill head can be optimally adapted to the particular material to be processed.

Abstract: Described herein is an apparatus for grinding a twist drill bit, especially for web thinning and split pointing of the tip of a twist drill. The apparatus includes a grinding disk and a drill bit holder movable relative thereto mounted on a support. The support may execute relative motion with respect to the grinding disk under cam control in two coordinates and using a grinding disk having an invariable profile, in order to produce tip grinding patterns of various types. Preferably, the cam control is performed by means of interchangeable templates so that it is possible, using only a single grinding disk, no longer subject to the necessity of dressing, to produce a multiplicity of tip surface patterns that are optimally adapted to the given drill bit geometry.

Abstract: A cutting tool is disclosed, particularly a ball track milling cutter, comprising a tool holder in which a turnover cutting disc is received that includes four cutting edges of circular arc segment shape. The cutting disc is received in a slot dividing the tool holder into two clamping jaws and is adapted to be clamped in position by a clamping screw which extends diametrically and passes through the cutting disc in the area of an opening. In addition to the clamping screw a thrust piece is provided to press the cutting disc with two cutting flanks axially against abutment faces at the bottom of the slot.

Abstract: The invention relates to an automatic machine tool for machining workpieces, including a number n of workpiece receivers that can be adjusted in angular and/or spatial position and including an equal number n of work stations, one of said work stations being an exchange station, said receivers or stations being disposed at mutual angular separations of 360.degree./n on a rotatable index table, said stations or said receivers being locally fixed thereon and said index table being advanceable in such a manner that each workpiece traverses all stations in the same sequence. By applying the invention reliable and precise machining, coupled with simple construction should be achieved. This is made possible by the fact that the drive of the index table is controllable so that a sequence of (n-1) rotary steps by 360.degree./n in one direction is followed by a rotary step of 360.degree. (n-1)/n in the opposite direction.