Abstract: In the case of an impactor (1) with an impact plate (7) and a classifying nozzle (2) directed at this impact plate (7), in the case of which the impact plate (7) is formed as an electronically readable resonantly oscillating, mass-sensitive element (7, 33), it is proposed to move the oscillating crystal (7, 33) held in an impact plate holder (8) in relation to the static classifying nozzle (2) by a motor (12) during the operation of the impactor (1).

Abstract: In the case of an impactor (1) with an impact plate (7) and a classifying nozzle (2) directed at this impact plate (7), in the case of which the impact plate (7) is formed as an electronically readable resonantly oscillating, mass-sensitive element (7, 33), it is proposed to move the oscillating crystal (7, 33) held in an impact plate holder (8) in relation to the static classifying nozzle (2) by a motor (12) during the operation of the impactor (1).

Abstract: The invention relates to a method and a device for the precision machining of crankshafts or camshafts to final size tolerances RZ<10 ?m, preferably ?5 ?m and concentricity tolerances?30 ?M, preferably 6 ?m. The crankshafts or camshafts has been machined by a cutting operation and at least partly subjected to hardening. According to the invention, after an initial cutting operation and subsequent hardening to 45 to 60 HRC, preferably 50 to 53 HRC, a final cutting operation is carried out using cutting inserts fitted with CBN or PCD inlets. The device used for this purpose has cutting inserts which are fitted with CBN or PCD inlets, wherein cutting inserts clamped in place laterally, radially and tangentially follow each other alternately.

Abstract: The invention relates to a cutting insert (10) with a base, having a supporting surface, a covering surface, at a distance therefrom and side faces (101, 102), connecting said surfaces, whereby two or several adjacent surfaces form cutting edges (103, 104, 105). According to said invention, the supporting surface is connected in a non-detachable manner to a supporting surface of a cutting plate (11), the geometry of which is different from the cutting insert (10) and suitable for another metal cutting operation.

Abstract: The invention relates to a cutting insert for clamping into a disc-type or strip-shaped tool body, in particular, for milling crankshafts, whereby the insert is substantially cuboid-shaped and has two front faces, two side faces, serving as cutting faces as well as an upper and a lower side face, whereby a convex face is arranged between the front faces and the upper and lower side faces, so that the upper and lower side faces and the convex face form cutting edges each with a side face. According to invention, the cutting insert has an inwardly-tapered face adjoining the convex face, which allows the cutting edge to protrude and tapered chamfers are provided between the inwardly-tapered faces of the front face on both sides of a planar supporting surface to the outer edge.

Abstract: The invention relates to a method and a device for the precision machining of crankshafts or camshafts to final size tolerances Rz<10 ?m, preferably ?5 ?m and concentricity tolerances ?30 ?M, preferably 6 ?m. The crankshafts or camshafts has been machined by a cutting operation and at least partly subjected to hardening. According to the invention, after an initial cutting operation and subsequent hardening to 45 to 60 HRC, preferably 50 to 53 HRC, a final cutting operation is carried out using cutting inserts fitted with CBN or PCD inlets. The device used for this purpose has cutting inserts which are fitted with CBN or PCD inlets, wherein cutting inserts clamped in place laterally, radially and tangentially follow each other alternately.

Abstract: The invention relates to a cutting insert (10) with a base, having a supporting surface, a covering surface, at a distance therefrom and side faces (101, 102), connecting said surfaces, whereby two or several adjacent surfaces form cutting edges (103, 104, 105). According to said invention, the supporting surface is connected in a non-detachable manner to a supporting surface of a cutting plate (11), the geometry of which is different from the cutting insert (10) and suitable for another metal cutting operation.

Abstract: A milling cutting has a rotatable cylindrical tool carrier and is provided with polygonal cutting inserts including radial cutting inserts on the sides of the carrier and longitudinal cutting inserts on the cylindrical periphery which alternate with the radial inserts. The tangential cutting inserts have their cutting edges inclined to the axis or rotation at about 25° and have their rear most parts at a spacing from the cutting edge of the next following radial insert of less than 5 mm. The tool is especially useful for machining the cheeks and pins of a crank shaft.

Abstract: In a turbo generator with a rotor with direct gas cooling, which rotor is provided with a rotor winding arranged around a central rotor body, said rotor winding being on the front sides covered by one each annular cap plate, and in which rotor cold cooling gas for cooling the rotor flows into ring gap segments between the cap plate and the rotor body, whereby the ring gap segments are bordered, when seen in circumferential direction, on the sides in each case by the section of an end spacer plate provided between the cap plate and the rotor winding, whereby this section is projecting into the ring gap, improved cooling is achieved in that separations of the cooling gas stream on flowing into the ring gap segments are avoided by designing the sections of the end spacer plates, whereby these sections adjoin the ring gap, in a manner that is advantageous with respect to the flow.

Abstract: In a turbo generator with a rotor with direct gas cooling, which rotor is provided with a rotor winding arranged around a central rotor body, said rotor winding being on the front sides covered by one each annular cap plate, and in which rotor cold cooling gas for cooling the rotor flows into ring gap segments between the cap plate and the rotor body, whereby the ring gap segments are bordered, when seen in circumferential direction, on the sides in each case by the section of an end spacer plate provided between the cap plate and the rotor winding, whereby this section is projecting into the ring gap, improved cooling is achieved in that separations of the cooling gas stream on flowing into the ring gap segments are avoided by designing the sections of the end spacer plates, whereby these sections adjoin the ring gap, in a manner that is advantageous with respect to the flow.

Abstract: In gas-cooled electrical machine with an axial fan (9) at one shaft end and with a rotor (1) and a stator body surrounded by a machine housing (14), a gas-guide device (18) arranged coaxially to the rotor shaft is provided in the outflow space (17) of the axial fan (9), out of which gas-guide device the cooling gas conveyed by the axial fan is fed to the rotor and to the stator body and stator winding. Said gas-guide device (18) comprises a plurality of guide rings (19-25) in the form of a cone envelope and spaced radially from one another and a ring part (27) likewise in the form of a cone envelope, which rings and ring part are connected to one another and to the machine housing (14) directly, or indirectly by means of bars (28, 29) extending essentially radially and/or guide plates (36, 36'). Ring-shaped channels (K.sub.1, . . . , K.sub.

Abstract: Industrial oven providing air recirculation for heat treatment processes having temperature uniformity within a charge to be treated, including oven walls, spacers disposed between the oven walls for supporting the charge at a distance from the oven walls defining a space therebetween and for allowing a recirculated hot air flow around the charge from all sides, and elements disposed in the space between the charge and the oven walls for influencing the air flow.

Abstract: A method for starting a blower in the form of a single-stage radial fan installed in a pressure system such as the circulating cooling system of a turbogenerator in which the resistance of the pressure system is varying during the starting operation by means of a starting duct provided with a throttling element. The throttling element is closed at any desired blower speed ranging from 10 to 100% of its rated speed when the point of intersection between the pressure system characteristic, modified on the basis of the open throttling element, and the blower characteristic has been reached whereupon the desired point of operation conforming to the blower characteristic and the system characteristic will regulate itself automatically.