Abstract: The invention relates to a method for producing a bevel gear wheel, in particular for rudder propellers, the teeth of which have a macro geometry specific to the gear wheels, the teeth of which can be described by flank and profile lines, the flanks of which have a tooth flank micro topography and the bearing surface of which represents the contact region of the inter-meshing teeth. The crown of a tooth flank corresponds to the elevation of the tooth flank center with respect to the tooth flank edge, wherein the course of the height and width crowns of the flank surface is substantially shaped like a circular arc.

Abstract: An apparatus (100) and method (200) of contact machining having applications in profiling operations utilizes at least one static cutting tool (101) and turret (102) driven by rotary motion (103) about a support mechanism (109) for providing sufficient force to achieve deformation by controlled fracturing (523). This allows the separation of material from a workpiece (105) without imposing axial symmetry upon either the cutting tool (101) or the workpiece (105). The apparatus and method mitigates and/or eliminates the adverse effects of plastic deformation (504) while machining a wider range of shapes and materials with greater productivity and precision than existing methods of machining.

Abstract: A toolholder (50) with a controllable critical angle, such as a lead, trailing, rake or clearance angles, includes a tool spindle (42a) for retaining the toolholder in a tool rest (42) of a machine tool. The machine tool (10) includes at least one linear axis, for example, three mutually perpendicular axes, a rotary axis and a rotation axis. The rotary axis and/or rotation axis is controllable to move to a specified position in synchronization with a movement of one of the linear axes. An adaptor (54) supports a cutting tool (56) that is retained in the adaptor by a clamp (58). The cutting tool (56) defines a critical angle, such as a lead angle, a trailing angle, a rake angle and a flank clearance angle, wherein the critical angle is corrected as a vector of movement of at least one of the linear axis is changed. In addition, the cutting tool (56) can be positioned on opposite side of a centerline of rotation of the workpiece to effectively double the life of the cutting tool.

Abstract: A cutting tool having a blade section on one end is mounted on a spindle of a cutting machine, and the blade section is contacted with a workpiece to perform planing of the workpiece into a desired shape. Because the tip of the blade section is disposed on the spindle axis, the position of the cutting edge is controlled by performing drive control of the X-axis and Y-axis of the spindle. Thus, the control of the cutting machine is simplified, and path errors resulting from synchronous control can be eliminated.

Abstract: A broaching cutter comprises a first shaft coupled to a cutter bit-carrying second shaft in such a way that the second shaft rotates when the first shaft rotates and is also radially displaceable with respect to the first shaft so that the second shaft revolves about the axis of the first shaft in a preselected pattern. A rotor on the end of the first shaft carries a connector in a slot in such a way that the connector is free to slide within the slot. The connector is attached to the second shaft and to a cam follower. As the connector slides, it displaces the second shaft radially with respect to the axis of rotation. The first shaft rotates within a stationary holder that has a cam race encircling the first shaft. The cam follower follows the cam race in the stationary holder, thereby varying the radial displacement of the connector. Thus, square, hexagonal or other shaped holes can be formed in a workpiece depending on the shape of the cam race.

Abstract: A broaching cutter comprises a first shaft coupled to a cutter bit-carrying second shaft in such a way that the second shaft rotates when the first shaft rotates and is also radially displaceable with respect to the first shaft so that the second shaft revolves about the axis of the first shaft in a preselected pattern. A rotor on the end of the first shaft carries a connector in a slot in such a way that the connector is free to slide within the slot. The connector is attached to the second shaft and to a cam follower. As the connector slides, it displaces the second shaft radially with respect to the axis of rotation. The first shaft rotated within a stationary holder that has a cam race encircling the first shaft. The cam follower follows the cam race in the stationary holder, thereby varying the radial displacement of the connector. Thus, square, hexagonal or other shaped holes can be formed in a workpiece depending on the shape of the cam race.

Abstract: A method of machining a workpiece after preheating consists in that the workpiece material to be removed by a cutting tool is subjected immediately before the removal operation to intense localized heating and notching by a plasma jet, with a groove being formed on the surface to be machined. To this end, a plasma torch is positioned ahead of the cutting tool so that the angle between the direction of the cutting speed and the plasma jet axis ranges from 0 to 45 degrees, and the angle between the direction of feed of the cutting tool and the plasma jet axis from 10 to 45 degrees.