Abstract: The present invention relates to a work machine, in particular in the form of a dump truck or truck, comprising a traction drive unit and/or main work unit which can be driven by a drive apparatus comprising at least one electric motor. The invention further relates to a method for operating such a work machine, in accordance with the invention, the drive apparatus comprises at least one hydraulic motor supporting the electric motor, the hydraulic motor being switched in for starting the drive apparatus and being decoupled on an exceeding of a predefined speed.

Abstract: A translocation-simulating loading apparatus for the gear grinding machine with the shaped grinding wheel is provided. The apparatus includes a load-receiving test piece disposed on the gear grinding machine with the shaped grinding wheel and a load-exerting component for use in loading simulation. The gear grinding machine enables linear movements along the X, Y, and Z axes, a rotary movement around the Y axis, a rotary movement C around the Z axis, and a rotary movement A around the X axis. An angle ? is formed between the axis L of a ball seat of the load-exerting component and the X axis direction of a Y axis component and an angle formed between the normal line of a load receiving face a and the X direction of the coordinate system of the machine tool is ?. A detection method for static stiffness distribution is provided.

Abstract: A gear shaping machine for the manufacture or machining of gears having a shaping tool and a shaping head bearing the shaping tool, where the shaping head is movable transversely to the shaping direction for the delivering and lifting of the shaping tool to the workpiece. A direct drive is provided for this purpose which moves the shaping head transversely to the shaping direction. Furthermore a corresponding method for the manufacture or machining of gears is described.

Abstract: An apparatus for automatically cutting a drawer slide groove and drilling a drawer-securing pin hole in a drawer with a bottom with a number of edges extending downwardly from the bottom, and a rear wall. The apparatus includes a support, the drawer resting on the support during the cutting and drilling operations; a power saw having a moving blade adapted for cutting a groove in the drawer; a first guide mounted on the support and adapted to engage one of the plurality of downwardly extending drawer edges, thereby positioning the saw blade adjacent the downwardly extending drawer edge; a drill carrier movable in a first direction and a second direction relative to the support; and a power drill mounted in the drill carrier and having a drill bit adapted to drill a drawer-securing pin hole in the rear wall of the drawer.

Abstract: The invention relates to a method for producing continuous corrections on a bevel gear, whereby by entering a plurality of corrections into the CNC control of the machine and interpolation between them, camber designs and even the designs of twists or the avoidance of twists on the tooth flanks can be performed by suitable superimposition of corrections on the inner and outer tooth tips with corrections of the plunger position.

Abstract: An apparatus for machining a bevel gear has an apparatus frame, a spindle head provided on the apparatus frame for rotatably supporting a spindle on which a machining tool is mounted, and an indexing unit provided for holding a workpiece such that the workpiece is indexed by one pitch of teeth to be formed thereon to perform machining of tooth spaces with the machining tool. The spindle is horizontally and rotatably held on a spindle head such that the spindle is immovable in the axial direction of the spindle. The spindle head is movable back and forth in the axial direction and is movable in a lateral direction at right angles to the axial line. A column is provided on the apparatus frame in front of the spindle head such that the column is turnable about a vertical axial line at an arbitrary angle. The indexing unit is provided in a plurality of pieces on an external periphery of the column at a distance between each of the indexing units.

Abstract: A method and apparatus for finishing bevel gears has a pair of bevel gears which are rotatably engaged in a meshing fashion while being imparted with a brake force therebetween and one of the bevel gears is rocked against the other along a tooth profile direction extending between a tooth top and tooth root of a gear tooth in a manner such that the rocking bevel gear swingably rocks around its pitch apex of the base pitch cone thereof. Further, the bevel gears finish contacting gear tooth surfaces of at least one of the bevel gears both by rotational contact and by sliding contact by rocking motion.

Abstract: A computer controlled machine for forming longitudinally curved tooth bevel and hypoid gears having a minimum number of movable machine axes for setup and operation. The movable axes include three rectilinear axes (X, Y, and Z) and three rotational axes (T, W and P). The rectilinear axes are arranged in mutually orthogonal directions. Two of the rotational axes (T and W) provide for rotating tool (26, 27) and work gear (42, 43), respectively. The third rotational axis (P) provides for adjusting the relative angular orientations of tool axis (T) and work axis (W). Pivot axis (P) is positioned with respect to both tool axis (T) and work axis (W) at fixed inclination angles. A method of opeating the computer controlled machine provides for controlling the movable axis (X, Y, Z, T, W, and P) in response to setup and operating parameters of conventional bevel and hypoid gear generating machines.

Abstract: The apparatus for grinding rough-cut longitudinally curved gear teeth of a helical bevel gear, comprises two spindles for respectively mounting a tool and a workpiece, and structure for translatably and adjustably arranging at least one spindle of these two spindles. A separate electric motor arranged coaxially with each of the two spindles serves for driving the tool and for driving the workpiece, respectively. The separate electric motors are mutually interconnected by an electric shaft.

Abstract: This method is for finish machining the teeth of rough machined bevel gears having longitudinally curved teeth where finish machining is undertaken subsequent to case hardening. To permit economical fabrication of such bevel gears at least in mass production, the bevel gears are ground as workpieces by a tool designed as a hypoid gear and provided with at least one abrading surface on tooth flanks of its toothing. The workpiece and the tool are brought into mesh and positively and synchronously rotarily driven in the ratio of their respective tooth numbers. Displacement of the tool axis relative to the workpiece axis as well as speeds of the tool and the workpiece are selected such that a relative sliding velocity arising between the tool and the workpiece lies within the range of conventional surface speeds for grinding. All concave tooth flanks of the workpiece or all convex tooth flanks of the workpiece or both are continuously ground in a single operation with a feed motion.

Abstract: Apparatus for milling a gear for a double enveloping worm gear drive. A rotating milling cutter is advanced toward a workpiece spindle to mill a flank of a gear tooth by tilting the milling cutter supporting frame about an axis that passes through the axis of rotation of the workpiece spindle to form a predetermined change in the helix angle from the top to the root of the tooth. The initial tilt setting of the cutter is adjusted to suit the root helix angle.

Abstract: A bevel gear cutting device which comprises a machine base, an upright support shaft extending upwardly from the base, a table support member rotatably supported at one end on the shaft, a gear blank rotating and rocking mechanism support member rotatably supported at one end on the shaft above the table support member, a gear blank rotating mechanism slidably supported on the second-mentioned support member, a gear blank rocking mechanism slidably supported on the second-mentioned support member adjacent to the gear blank rotating mechanism, a main shaft extending through the gear blank rotating and rocking mechanisms and drive means for the main shaft.