In a machine tool and a control apparatus thereof, a repetitive movement unit is configured so that the cutting tool performs one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool and so that a rotation angle of the relative rotation between the workpiece and the cutting tool during relative movement at a second speed is smaller than a rotation angle of the relative rotation during relative movement at a first speed in one repetitive movement. This configuration limits degradation of machining efficiency when the cutting tool machines the workpiece by performing one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool.

A sensing and positioning device adapted to be mounted on a spindle of a machine tool including: a fixing element; and at least three sensing elements adapted to be connected operationally to a programmable control unit of a machine tool. The sensing and positioning device is adapted to be used with a machining tool mounted on the spindle. A machine tool including a workpiece table, a machining head, and movement means adapted to move the machining head above the workpiece table. The machine further includes the device described above. An associated machining method is also described.

Provided is an NC program generating device that generates an NC program used in laser machining, using a rapid traverse command that moves a relative position between a machining head and a workpiece at a first movement speed, and a linear interpolation movement command that moves the relative position at a second speed, while causing the relative position to trace the workpiece, the device comprising: a movement time calculation unit that calculates a first movement time of the relative position when using the rapid traverse command and a second movement time of the relative position when using the linear interpolation command, a movement method selection unit that selects the movement command corresponding to the shorter time of the first movement time and the second movement time, and an NC program generating unit that generates an NC program by setting the selected movement command between the machining points.

Provided is an NC program generating device that generates an NC program used in laser machining, using a rapid traverse command that moves a relative position between a machining head and a workpiece at a first movement speed, and a linear interpolation movement command that moves the relative position at a second speed, while causing the relative position to trace the workpiece, the device comprising: a movement time calculation unit that calculates a first movement time of the relative position when using the rapid traverse command and a second movement time of the relative position when using the linear interpolation command, a movement method selection unit that selects the movement command corresponding to the shorter time of the first movement time and the second movement time, and an NC program generating unit that generates an NC program by setting the selected movement command between the machining points.

An automatic lathe includes a main spindle that rotates a workpiece about a shaft center, a cutting tool that processes the workpiece, a feeder that moves the cutting tool, an input receiver that receives inputs regarding an eccentric distance and a radius, and a controller that controls the movement by the feeder such as to set a virtual circle having a radius of the distance, to set an offset virtual circle having a center at a position where a center of the virtual circle is offset from the shaft center of the workpiece in the radial direction of the workpiece by the radius, and to move the cutting tool along an circumference of the offset virtual circle in relation to a rotation of the workpiece by the main spindle. A hole is processed, which has the radius at a position away from the shaft center by the distance.

A method of manufacturing a structural object includes: receiving a data set including workpiece three-dimensional measurement data and first specific information of first identifier three-dimensional measurement data associated with the workpiece three-dimensional measurement data; acquiring second identifier three-dimensional measurement data by measuring a three-dimensional shape of the identifier; reading out the workpiece three-dimensional measurement data from the data set including the first specific information that coincides with second specific information of the second identifier three-dimensional measurement data; and determining a machining plan based on the read workpiece three-dimensional measurement data.

Grinding and/or erosion machine (10) for machining a chip-cutting rotary tool including a tool body (18) and several cutting plates (19) per existing pitch (TR). A control device (25) activates an axis arrangement (11) to move a machine tool (12) and the rotary tool (13) to be machined relative to each other. An interface device (26) triggers a data import function for reading-in the position data of the cutting plates (19). The position data (P) describe at least one angular value (1, 2), a first length value (z1) and a second length value (z2). The control device (25) imports the position data (P) in chaotic order and allocates the position data (P) of each cutting plate (19) in the imported machine data set (M) to respectively one separate virtual pitch (TV), independent of whether the cutting plates (19) belong to a common pitch of the rotary tool (13).

Provided is a manufacturing method for a compound screw having a first thread groove and a second thread groove with a different lead angle or lead direction from the first thread groove, wherein at least a portion of the first thread groove is formed by feeding a threading tool that acts on a workpiece a first feed amount toward the workpiece, the workpiece being a rotating object to be machined. Additionally, at least a portion of the second thread groove is formed by feeding the threading tool that acts on the workpiece a second feed amount that differs from the first feed amount. With these steps, a compound thread portion is formed in the workpiece. As a result, it is possible to mass produce a compound screw having two thread structures of differing lead angles and/or lead directions with a high level of quality.

A kitchen appliance has a power switch for controlling supply of power to a motor and a separate control circuit (18) for controlling the speed. A button (14) for control by the user is provided for controlling both the actuation and speed. A carrier (40) carries the button, and also carries a first actuator (44, 86) for mechanically actuating the power switch when the button is first moved. When the button is further moved, the motor speed is controlled.

An electromagnetic chamber absorber provided improved absorption across a wideband and both lower diffuse and specular scatter and a method for constructing the same. An exemplary device can compromise a periodic arrangement of disconnected electromagnetically lossy elements where the periodicity of the lattice is adjusted to suppress all or most grating lobe scattering. Because the electromagnetically lossy elements are disconnected, scalable manufacturing approaches are enabled. The lossy elements can be easily fabricated via shaping, which includes rolling, folding and cutting resistive and/or magnetic sheet materials. The lossy elements can be repeatably placed in a periodic lattice using low density scaffolding approaches and/or other alignment mechanisms. The absorption at the lower frequency part of the electromagnetic bands (below 1-2 GHz) can be improved via the addition of parallel lossy sheets into the low-density scaffolding.