Abstract: Reference phase variation values ?k1 to ?Kn, each of which is a variation among a plurality of phases that occur during non-machining and phase variation values ?1 to ?n, each of which is a variation among a plurality of phases that occur during machining are detected from measured vibration with the use of a chattering detector that is used to calculate phases of a desired number (n) of frequencies. If ?Ki??i is smaller than a determination value TK, it is determined that chattering having a frequency i is occurring.

Abstract: A spindle unit includes: a main spindle that holds a rotary tool, and that is rotated; bearings by which the main spindle is rotatably supported; and a damper bearing by which the main spindle is rotatably supported, and that has a damping coefficient larger than damping coefficients of the bearings. The damping coefficient of the damper bearing is set to a value within a range from 10,000 to 1,000,000 N·s/m.

Abstract: A spindle unit includes: a main spindle that holds a rotary tool, and that is rotated; bearings by which the main spindle is rotatably supported; and a damper bearing by which the main spindle is rotatably supported, and that has a damping coefficient larger than damping coefficients of the bearings. The damping coefficient of the damper bearing is set to a value within a range from 10,000 to 1,000,000 N·s/m.

Abstract: An optimal process determining system executes a step of calculating a temporary process that includes information of a plurality of individual processes. According to an example, each process includes a tooling including of a tool, a holder, a tool projection length, and a sequence of the plurality of individual processes. A similarity between the toolings of two individual processes is calculated. In addition, a calculation is performed relating to a plurality of integrated processes for which the tooling of one of the individual processes having a high similarity is integrated into the tooling of the other one of the individual processes. In addition, an optimal process is determined from the plurality of integrated processes on the basis of an actual machining time in each of the integrated processes, a unit integration reduction time reduced as one of the toolings of the individual processes is integrated, and the number of the individual processes integrated.

Abstract: A machined shape determining step of determining a machined shape machined by a basic tooling or basic tooling template of each machining efficiency group from a material shape (S19), a tooling determining step of determining an optimal tooling comprising a combination of a tool, a holder and a tool projection length on the basis of information of the tools and the holders, stored in a tool holder information storage unit, the combination having a maximum machining efficiency and being able to form the material shape into a corresponding one of the machined shapes without interfering with the machined shape (S20), a process candidate determining step of determining an optimal process candidate using the optimal tooling of each machining efficiency group (S21), and a process determining step of determining an optimal process on the basis of the optimal process candidate of each machining efficiency group (S10), are executed.

Abstract: Reference phase variation values ?k1 to ?Kn, each of which is a variation among a plurality of phases that occur during non-machining and phase variation values ?1 to ?n, each of which is a variation among a plurality of phases that occur during machining are detected from measured vibration with the use of a chattering detector that is used to calculate phases of a desired number (n) of frequencies. If ?Ki??i is smaller than a determination value TK, it is determined that chattering having a frequency i is occurring.

Abstract: It is an object of the present invention to provide a machining parameter optimizing apparatus deciding a tool axis attitude and a machining zone and deciding a tooling having high stiffness for any profile of a finished workpiece. A tool axis attitude deciding member 21 decides one or plural tool axis attitude. An interference dangerous zone deciding member 23 decides as an interference dangerous zone a zone possible to interfere between a tool or a tool holder and a workpiece during machining by the decided tool axis attitude. A machining simulation member 25 executes a machining simulation based on the interference dangerous zone by the decided tool axis attitude and generates the virtual tool holder in which there is no any interference, and also decides a machining zone in a way of avoiding the interference dangerous zone.

Abstract: An optimal process determining system executes a step of calculating a temporary process that includes information of a plurality of individual processes. According to an example, each process includes a tooling including of a tool, a holder, a tool projection length, and a sequence of the plurality of individual processes. A similarity between the toolings of two individual processes is calculated. In addition, a calculation is performed relating to a plurality of integrated processes for which the tooling of one of the individual processes having a high similarity is integrated into the tooling of the other one of the individual processes. In addition, an optimal process is determined from the plurality of integrated processes on the basis of an actual machining time in each of the integrated processes, a unit integration reduction time reduced as one of the toolings of the individual processes is integrated, and the number of the individual processes integrated.

Abstract: A machined shape determining step of determining a machined shape machined by a basic tooling or basic tooling template of each machining efficiency group from a material shape (S19), a tooling determining step of determining an optimal tooling comprising a combination of a tool, a holder and a tool projection length on the basis of information of the tools and the holders, stored in a tool holder information storage unit, the combination having a maximum machining efficiency and being able to form the material shape into a corresponding one of the machined shapes without interfering with the machined shape (S20), a process candidate determining step of determining an optimal process candidate using the optimal tooling of each machining efficiency group (S21), and a process determining step of determining an optimal process on the basis of the optimal process candidate of each machining efficiency group (S10), are executed.

Abstract: It is an object of the present invention to provide a machining parameter optimizing apparatus deciding a tool axis attitude and a machining zone and deciding a tooling having high stiffness for any profile of a finished workpiece. A tool axis attitude deciding member 21 decides one or plural tool axis attitude. An interference dangerous zone deciding member 23 decides as an interference dangerous zone a zone possible to interfere between a tool or a tool holder and a workpiece during machining by the decided tool axis attitude. A machining simulation member 25 executes a machining simulation based on the interference dangerous zone by the decided tool axis attitude and generates the virtual tool holder in which there is no any interference, and also decides a machining zone in a way of avoiding the interference dangerous zone.

Abstract: A shape measuring instrument is provided as being capable of measuring a surface shape of a target with a small contact force while changing the contact force. A measuring probe 32 is supported while a tilt ? is provided. A retracting force of the measuring force 32 is produced by the tilt ?, and thus, is obtained as mgsig ? which is much small as compared with a self weight “m”. On the other hand, biasing is provided with an extruding force Fc by means of an air cylinder 40. Thus, a contact force of the measuring probe 32 relevant to a work piece W is obtained as a difference between a measuring probe self weight tilt component mgsig? and the extruding force Fc of the air cylinder 40 (F=Fc?mgsig?), thus making it possible to reduce a contact force to be very small.

Abstract: A shape measuring instrument is provided as being capable of measuring a surface shape of a target with a small contact force while changing the contact force. A measuring probe 32 is supported while a tilt ? is provided. A retracting force of the measuring force 32 is produced by the tilt ?, and thus, is obtained as mgsig ? which is much small as compared with a self weight “m”. On the other hand, biasing is provided with an extruding force Fc by means of an air cylinder 40. Thus, a contact force of the measuring probe 32 relevant to a work piece W is obtained as a difference between a measuring probe self weight tilt component mgsig? and the extruding force Fc of the air cylinder 40 (F=Fc?mgsig?), thus making it possible to reduce a contact force to be very small.