Abstract: A cutting tool for internal and external turning has a body with straight main cutting edge, a curved auxiliary cutting edge, and a chip guiding shoulder extending in parallel to the feed advance direction of the tool. The main cutting edge forms a tangent to the curved auxiliary cutting edge. Further, the main cutting edge encloses an angle of 3.degree. to 9.degree. with the direction of the chip guiding shoulder an normally with the feed advance direction. This construction makes the tool substantially independent of tool positioning errors whereby the cutting quality is increased.

Abstract: According to the present apparatus work pieces such as railroad wheels are power clamped on a cone shaped inwardly facing side. In a first clamping step clamping areas are impressed into the side or surface of the work piece said clamping areas having a suitable inclination. In a second clamping step the actual power clamping is performed at these clamping areas. For this purpose a plurality of radially moving clamping jaws are arranged to carry at least one clamping tooth. Each clamping tooth in turn is adjustable in its position in an axial direction along its respective radially moveable clamping jaw.

Abstract: This invention relates to an underfloor wheel set lathe for the profiling of wheel sets of trackbound vehicles of the type in which the wheels are at least in part supposed by rolls carried by a roll carrier, at least one of the rolls being driven. Movement of the roll carrier is resisted by a horizontally acting brake mechanism which permits vertical lifting movements of the carrier. The force with which horizontal movement is resisted may, by suitable hydraulic means, be controlled as a function of the cutting force or driving force imparted to the wheels, the lifting force exerted against the wheels, or otherwise coordinated with the force applied in the course of profiling.

Abstract: The present invention relates to a method of cold rolling metal parts to achieve improved surface uniformity and hardening. The method comprises applying to the work piece a pulsating force at a frequency of from about 30 to 300 the duration of the pulses being at least twice the time between pulses. The pulsating force varies from about 10% to 100% above the minimum force necessary to achieve a smooth rolled finish. The method contemplates just statically rolling the work piece and thereafter applying the pulsing force which, in such instance may reduce to zero.

Abstract: According to the present method and apparatus work pieces such as railroad wheels are power clamped on a cone shaped inwardly facing side. In a first clamping step clamping areas are impressed into the side or surface of the work piece said clamping areas having a suitable inclination. In a second clamping step the actual power clamping is performed at these clamping areas. For this purpose a plurality of radially moving clamping jaws are arranged to carry at least one clamping tooth. Each clamping tooth in turn is adjustable in its position in an axial direction along its respective radially moveable clamping jaw.

Abstract: A method for centering the wheels of a two wheel set with the centerline extending between the dead centers of a machining-, measuring-, or testing-apparatus, in which each wheel of the set is lifted by a separate lifting device and in which the position of each wheel during its lifting is sensed by a separate sensing device, coordinated with the respective lifting device, to stop further lifting movement of the respective lifting device when the center of the respective wheel coincides with the centerline of the apparatus, to thus properly align the centers of the wheels of the two wheel sets with the centerline of the apparatus regardless of any difference of the diameters of the two wheels or any asymmetrical loading on the axle of the wheel set; and an apparatus for carrying out the method.

Abstract: A method for controlling proper clamping of a workpiece in a clamping device, the clamping jaws of which are moved to a clamping position by movement of a piston of hydraulically operated cylinder-and-piston means in a clamping direction, in which a control signal is produced indicating proper clamping of the workpiece when sensing means cooperating with the piston indicate that the latter, during its movement in clamping direction, has reached at least a first position but not reached a second position spaced in clamping direction from the first position, while at the same time a predetermined pressure acting in clamping direction on the piston is indicated.