A numerical control device for a machine tool, the machine tool including: a reference shaft that moves a tool or a workpiece; and a superimposition shaft that moves a tool or the workpiece. The numerical control device superimposes the movement amount of the reference shaft on the movement amount of the superimposition shaft. The numerical control device including a control computation unit that, in response to a superimposition control command, changes at least one of a first vibration rate, a second vibration rate, and a main shaft rotation speed on a basis of a first vibration command, a second vibration command and a main shaft rotation speed command such that the first vibration rate stays constant and the second vibration rate stays constant. The first vibration rate is a number of times that of the reference shaft vibrates per rotation of a main shaft.

A numerical control device for a machine tool, the machine tool including: a reference shaft that moves a tool or a workpiece; and a superimposition shaft that moves a tool or the workpiece. The numerical control device superimposes the movement amount of the reference shaft on the movement amount of the superimposition shaft. The numerical control device including a control computation unit that, in response to a superimposition control command, changes at least one of a first vibration rate, a second vibration rate, and a main shaft rotation speed on a basis of a first vibration command, a second vibration command and a main shaft rotation speed command such that the first vibration rate stays constant and the second vibration rate stays constant. The first vibration rate is a number of times that of the reference shaft vibrates per rotation of a main shaft.

The invention relates to a grinding and/or erosion machine (10), as well as to a method for gauging and referencing the axis arrangement (11) comprising several machine axes (12), wherein each can be configured as a rotational or translational machine axis. To do so, a measuring disk (28) is inserted in a tool spindle (13) and a test mandrel (27) is inserted in a workpiece holding device (14). The test mandrel (27) is electrically connected to a reference potential, preferably ground (M). The measuring disk (28) is electrically connected to a supply voltage potential (UV). By forming a contact between the measuring disk (28) and the test mandrel (27), a measuring current (IM) flows between the supply voltage potential (UV) and the reference potential and, in accordance with the example, from the supply voltage potential (UV) to ground (M). The flow of this measuring current (IM) may be detected in a monitoring device (31), and the actual position of the machine axes (12) at the time of the start of the current flow of the measuring current (IM) can be determined. Via the axis arrangement (11), one or more contact locations (K) between the measuring disk (28) and the test mandrel (27) can be approached, and, as a result of this, referencing or gauging of the axis arrangement (11) and the machine, respectively, can take place.

This invention disclosures a six degree-of-freedom (DOF) measuring system and method. The measuring system comprises a tracking measurement device and a target. The tracking measurement device includes a processor, a camera and two rotation optical components connected with the processor respectively, which are arranged in sequence. The camera boresight and the optical axis of two rotation optical components are coaxial, and each rotation optical component can rotate independently. The target is mounted on the tested object, which contains at least three markers with known distance constraints. In addition, at least one marker does not coincide with the midpoint of the line connecting any two of the remaining markers. Compared with the prior technologies, this invention realizes a dynamic real-time measurement of six DOF for the tested object. In the process of measurement, only the target is fixed on the object. The target has the advantages of simple structure, less influence on the actual operation of the target and easy use. Meanwhile, the calculation process of 6 DOF measurement is simplified, and the real-time and reliability of the measurement method is improved.

This invention disclosures a six degree-of-freedom (DOF) measuring system and method. The measuring system comprises a tracking measurement device and a target. The tracking measurement device includes a processor, a camera and two rotation optical components connected with the processor respectively, which are arranged in sequence. The camera boresight and the optical axis of two rotation optical components are coaxial, and each rotation optical component can rotate independently. The target is mounted on the tested object, which contains at least three markers with known distance constraints. In addition, at least one marker does not coincide with the midpoint of the line connecting any two of the remaining markers. Compared with the prior technologies, this invention realizes a dynamic real-time measurement of six DOF for the tested object. In the process of measurement, only the target is fixed on the object. The target has the advantages of simple structure, less influence on the actual operation of the target and easy use. Meanwhile, the calculation process of 6 DOF measurement is simplified, and the real-time and reliability of the measurement method is improved.

This numerical control device is provided with: a first acquisition unit that acquires start position information indicating the start position at which a contact body starts to measure an object to be measured in manual measurement; a second acquisition unit that acquires contact position information indicating the contact position at which the contact body and the object to be measured come into contact with each other; a determination unit that determines the direction in which the contact body approaches the object to be measured on the basis of the start position information acquired by the first acquisition unit and the contact position information acquired by the second acquisition unit; and a calculation unit that corrects the contact position information on the basis of the direction determined by the determination unit and thereby calculates the measurement position.