Abstract: A method for generating material test samples for conducting material tests of a legacy steam turbine rotor having an inter-blade region rotor surface, and an inlet region rotor surface adjoining the inter-blade region rotor surface. The method includes forming an annular ring of rotor material in the sample area and forming a material test sample from a portion of the annular ring. Also described is a legacy steam turbine rotor including an inter-blade region rotor surface, and an inlet region rotor surface adjoining the inter-blade region rotor surface. The steam turbine rotor having a groove formed therein, and wherein the groove is machined to enable removal of material from the steam turbine rotor to form samples configured to enable at least one of conducting material property tests and operating the improved legacy steam turbine rotor at an expanded thermal stress compared to the legacy steam turbine rotor.

Abstract: A screw-in tool and a tool holder for such a screw-in tool. The screw-in tool contains a tool head and a tool shank having an outer thread and a supporting region arranged between the tool head and the outer thread. The supporting region is formed by two conical bearing faces having different cone angles.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut only a first flank portion of a plurality of gear teeth; and a second set of broaching teeth configured to cut only a second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: The present invention provides a multi fiber optical ferrule, a tool for forming the ferrule, and a method of making the ferrule. The multi fiber optical ferrule is formed of two ferrule halves which are either molded or cast as imprecise blanks which are machined using a broach in order to precisely cut inner surfaces thereof for receiving an array of fibers. The inner surfaces of a pair of ferrule halves are cut simultaneously in order to assure accuracy in the fiber receiving and pin receiving channels. The halves are joined together with a fiber array placed therebetween to form the ferrule.

Abstract: A vertical broaching machine comprises a machine stand having an upper rail and a lifting carriage displaceably guided on the stand and drivable by means of lifting spindles which are supported in spindle nuts lodged in the rail for rotational driving. An upper workpiece holder is mounted on the rail, holding a broach when a compressive broaching job is carried out.

Abstract: A turn broaching machine can be used either as a single turn broaching machine or as a set turn broaching machine with a minimal retooling expense by employing two independently movable tool supports into which either a single turn broaching tool or a turn broaching tool set can be inserted, where the ends are designed so they are suitable for chucking in the chucks of the two tool supports.

Abstract: A press for manufacturing helical gears having a punch with a cutting edge; a die with a cutting edge, one of the cutting edges being shaped as a helical gear and the other having a shape corresponding to the shape of the one cutting edge; and a bolster rotatable about an axis and provided with one of the die and the punch. The die and said punch are pressed together and the bolster is rotatably driven by a driving element in response to a lead of a helical gear to be manufactured. The stroke of the punch is detected and a desired rotation angle of a driving element is calculated and then signalled to the driving element.

Abstract: An apparatus for machining turbine blades of a radial entry type to form in each blade a groove of a Christmas tree shape for mounting the blade on a turbine rotor including a main spindle, a rotary disk supported on the main spindle, and a plurality of cutters supported on the rotary disk through a cutter holder in positions forming an arc on the surface of the disk. The cutters are located such that those of a configuration suitable for use in giving coarse finishes, those of a configurator suitable for giving middling finishes and those of a configuration suitable for giving final fine finishes are arranged successively in positions forming an arc on the disk. A blade to be machined is supported in a position in which a groove thereof crosses paths of movement of the cutters as the disk is rotated. Thus, the blade can be machined to give fine finishes to the groove.

Abstract: A manufacturing tool for finishing a preformed scroll for use in a scroll type fluid displacement apparatus is disclosed. The tool includes a working member having an end plate and a first involute element extending from one end surface of said end plate. A cutting edge extends along the inner side wall of an axial end of the first involute, and the end plate has a plurality of arc shaped holes along the outer side wall of the first involute element. A second involute element is rotatably coupled to the working member and interfits with the first involute element in a disposition to define a radial gap between the first and second involute elements. A cutting edge extends along the outer side wall of a first axial end of the second involute. A plurality of pins project axially from the other axial end of the second involute element and penetrate through the arc shaped holes. A rotatable member has a plurality of holes extending in the axial direction.