A method for manufacturing a roll mold by cutting a roll, includes generating a control waveform based on a signal corresponding to a rotary position of the roll, and making a plurality of cuts on a surface of the roll by, while the roll is rotated, reciprocating a cutting blade in a radial direction of the roll in accordance with the control waveform. Making the plurality of cuts includes at each of a plurality of predetermined locations, making a predetermined number of cuts of predetermined depth based on the control waveform. Generating the control waveform includes generating a control waveform dictating that, when multiple cuts are made at a predetermined location, each subsequent cut will have a smaller depth than a preceding cut.

A method for manufacturing a roll mold by cutting a roll, includes generating a control waveform based on a signal corresponding to a rotary position of the roll, and making a plurality of cuts on a surface of the roll by, while the roll is rotated, reciprocating a cutting blade in a radial direction of the roll in accordance with the control waveform. Making the plurality of cuts includes at each of a plurality of predetermined locations, making a predetermined number of cuts of predetermined depth based on the control waveform. Generating the control waveform includes generating a control waveform dictating that the predetermined locations, the predetermined depths, or both are randomly selected. Generating the control waveform includes generating a control waveform dictating that, when multiple cuts are made at a predetermined location, each subsequent cut will have a smaller depth than a preceding cut.

A holder provided for mounting of a lathe cutter includes a carrier, a first joint seat, a second joint seat, a limit rod and a clamp member. The first and second joint seats are disposed on a first and second base of the carrier respectively. The lathe cutter is mounted between the first and second joint seats. The limit rod is inserted into a through hole of the lathe cutter, and a first and second ends of the limit rod are coupled to the first and second joint seats respectively. The clamp member is disposed on the limit rod. The clamp member and the second joint seat are provided to clamp the lathe cutter to separate the lathe cutter from the first and second bases.

A system for fabricating coded lenses includes a cutting tool configured to controllably cut a workpiece at a specified position-dependent depth while traversing a surface of the workpiece along a specified two-dimensional path. A signal generator is operative to generate a signal for controlling fabrication of a coded lens from the workpiece. A vibration tool is operative to ultrasonically vibrate the cutting tool for cutting of gratings on the workpiece.

An example method includes performing a machining operation by providing linear movement of a tool along a feed axis relative to a workpiece while superimposing oscillation of the tool onto the feed axis and providing rotation of the tool relative to the workpiece. During an optimization mode, the machining operation is performed on a first workpiece portion while providing the linear movement at an initial feed velocity, and sequentially superimposing the oscillating at a plurality of different frequencies. An optimal oscillation frequency is determined from the plurality of different frequencies which causes the tool to apply less force to the first workpiece portion at the initial feed velocity than others of the frequencies. During a run mode, the machining operation is performed on a second workpiece portion having a same composition as the first workpiece portion while superimposing the oscillation at the optimal oscillation frequency.

Spindle for carrying out machining assisted by non-ultrasonic axial oscillations, including a tool-bearing shaft, and an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation. The exciting portion including a first exciting stage, having at least one piezoelectric actuator, and a second exciting stage, having at least one piezoelectric actuator, having a non-zero axial overlap with the first exciting stage, the actuators of the two stages being arranged so that their effects add.

In an ultrasound-assisted method, in each of at least two sonotrode arms (8, 9) of a sonotrode (7) that is fixed in a protruding manner, said sonotrode arms being connected to each other by means of a respective joint (10) in each case, a respective ultrasonic wave that is transverse to the protrusion direction and that oscillates in a resonance mode is produced, wherein ultrasonic waves superposed in the at least one joint (10) and oscillating in the sonotrode arms (8, 9) of the joint (10) oscillate at a phase offset from each other, and the oscillation planes of the superposed ultrasonic waves are parallel to each other. An ultrasonic system suitable for carrying out the method comprises an ultrasound source (1), a sonotrode (7) protruding from a sonotrode retainer (6), wherein the sonotrode (7) has at least two sonotrode arms (8, 9), which are connected to each other by means of a respective joint (10) in each case and of which at least two produce different resonance modes under ultrasonic excitation, and ultrasonic waves superposed in the at least one joint (10) and oscillating in the sonotrode arms (8, 9) of the joint (10) oscillate at a phase offset from each other. The invention further relates to a corresponding sonotrode (7).

A combined skiver and a smooth rolling tool with a skiver head and behind this a smooth rolling head, wherein between the skiver head and the rolling head an exclusive torque transmitting coupling is located which restricts the allowable axis shaft offset and/or the angular position of the axes of the rolling head and skiver head, to which the rolling head is connected, characterized in that the skiver head (2) is guided through a workpiece bore via a hydrostatic guideway.

A machining device including a framework, a transmission shaft and a drive mechanism including a rotation member for driving the shaft in rotation about its axis, a drive member in helical connection with the shaft to drive the translation thereof along its axis with a feed movement, according to the relative rotational speed of the rotation and drive members. The drive member is mounted with the ability to effect translational movement with respect to the framework along the axis and is positioned between the rotation member and an end for coupling of the shaft to a cutting tool, while an electromechanical actuator is mounted in a fixed frame of reference associated with the framework in front of the drive member to which it can be coupled in order to cause it to oscillate translationally so as to superpose an axial oscillation component with the feed movement.

A machine tool of high-frequency vibration is provided. A main shaft structure of the machine tool comprises a rotating shaft, the end of which is provided with a tool holder chuck for fixing a tool holder; the upper portion of which is provided with a rotating coil portion; the main shaft structure is correspondingly provided with a stationary coil portion; and the tool holder is provided with a high-frequency vibration module. By non-contact coils, an external electric power/signal can be transmitted into the high-frequency vibration module to avoid a wear phenomenon in a contact-rotating electrode. Because the inductive coil is arranged outside of the tool holder, the manufacturing cost of the tool holder is reduced, and the convenience of changing the tool holder is increased. Moreover, the machining stability and efficiency of the tool holder are improved by a control method of sensing/feedback signals with wireless transmission.