Abstract: A spindle device of a machine tool is provided with: a rear-side bearing and front-side bearings which rotatably support a spindle with respect to a housing; a built-in motor which is disposed around the spindle between the front-side bearings and the rear-side bearing; heat pipes which are embedded in the spindle and which transmit heat between the central part and the rear-end part of the spindle; a plurality of plate-like inner fins which are affixed to a rear part of the spindle that protrudes rearward of the rear-side bearing and which extend perpendicularly with respect to the rotation axis of the spindle; and a plurality of plate-like outer fins which are affixed to the housing and which are disposed between the plurality of inner fins in such a manner as not to contact the inner fins.

Abstract: The step for performing machine learning includes acquiring shape data; acquiring geometric information for each of a plurality of machining faces; acquiring a tool path pattern selected for the machining faces from among a plurality of tool path patterns; and performing machine learning by using the geometric data for known workpieces and the tool path patterns wherein the input is the geometric information for the machining faces and the output is the tool path pattern for the machining faces. The step for generating a new tool path includes: acquiring shape data for the workpiece; acquiring geometric information for each of the plurality of machining faces of the workpiece to be machined; and generating a tool path pattern for each of the plurality of machining faces on the workpiece on the basis of the results of the machine learning using the geometric information of the workpiece to be machined.

Abstract: In a moving body guiding device which supplies lubricating oil between a guiding surface of a supporting body and a sliding surface of the moving body and guides a moving body, a lubricating oil pocket having a periphery enclosed by a land portion is provided on the sliding surface of the moving body, a closed loop oil groove is formed along the inside of the land portion, a front portion and a rear portion inside the lubricating oil pocket communicate with one another by means of a lubricating oil pocket return passage at least partially opening in the oil groove, and lubricating oil that has accumulated in the rear portion, in a movement direction, concomitant with movement of the moving body, flows to the front portion in the movement direction.

Abstract: In a moving body guiding device which supplies lubricating oil between a guiding surface of a supporting body and a sliding surface of the moving body and guides a moving body, a lubricating oil pocket having a periphery enclosed by a land portion is provided on the sliding surface of the moving body, a closed loop oil groove is formed along the inside of the land portion, a front portion and a rear portion inside the lubricating oil pocket communicate with one another by means of a lubricating oil pocket return passage at least partially opening in the oil groove, and lubricating oil that has accumulated in the rear portion, in a movement direction, concomitant with movement of the moving body, flows to the front portion in the movement direction.

Abstract: A spindle device of a machine tool is provided with: a rear-side bearing and front-side bearings which rotatably support a spindle with respect to a housing; a built-in motor which is disposed around the spindle between the front-side bearings and the rear-side bearing; heat pipes which are embedded in the spindle and which transmit heat between the central part and the rear-end part of the spindle; a plurality of plate-like inner fins which are affixed to a rear part of the spindle that protrudes rearward of the rear-side bearing and which extend perpendicularly with respect to the rotation axis of the spindle; and a plurality of plate-like outer fins which are affixed to the housing and which are disposed between the plurality of inner fins in such a manner as not to contact the inner fins.

Abstract: The step for performing machine learning includes acquiring shape data; acquiring geometric information for each of a plurality of machining faces; acquiring a tool path pattern selected for the machining faces from among a plurality of tool path patterns; and performing machine learning by using the geometric data for known workpieces and the tool path patterns wherein the input is the geometric information for the machining faces and the output is the tool path pattern for the machining faces. The step for generating a new tool path includes: acquiring shape data for the workpiece; acquiring geometric information for each of the plurality of machining faces of the workpiece to be machined; and generating a tool path pattern for each of the plurality of machining faces on the workpiece on the basis of the results of the machine learning using the geometric information of the workpiece to be machined.

Abstract: A coolant supply apparatus includes variable delivery coolant pump (100) pumping up coolant from coolant tank (104), a plurality of branch passages (120 to 124) allowing coolant (108) delivered from coolant pump (100) to flow separately to a plurality of parts of a machine tool, and machine control unit (110) turning on and off on-off valves (136) of the plurality of branch passages (120 to 124), wherein machine control unit (110), in response to a jet coolant instruction, opens only one branch passage to intensively supply coolant (108) to the branch passage at the maximum delivery rate of coolant pump (100) and closes the other branch passages.

Abstract: A coolant supply apparatus includes variable delivery coolant pump (100) pumping up coolant from coolant tank (104), a plurality of branch passages (120 to 124) allowing coolant (108) delivered from coolant pump (100) to flow separately to a plurality of parts of a machine tool, and machine control unit (110) turning on and off on-off valves (136) of the plurality of branch passages (120 to 124), wherein machine control unit (110), in response to a jet coolant instruction, opens only one branch passage to intensively supply coolant (108) to the branch passage at the maximum delivery rate of coolant pump (100) and closes the other branch passages.

Abstract: A shaft 17 defines a front end portion 17a having a larger diameter and an opposite tail end portion 17b having a smaller diameter, the shaft 17 being rotatably supported by the housing 13 through a radial bearing 19 and a pair of angular ball bearings 21 at the front side large diameter portion 17a and the small diameter portion 17b, respectively.

Abstract: A shaft 17 defines a front end portion 17a having a larger diameter and an opposite tail end portion 17b having a smaller diameter, the shaft 17 being rotatably supported by the housing 13 through a radial bearing 19 and a pair of angular ball bearings 21 at the front side large diameter portion 17a and the small diameter portion 17b, respectively.

Abstract: A machine tool with an improved capability of discharging and collecting the cutting chips is disclosed. A bed (13) is provided with troughs (39) extending through the bed (13) in a direction substantially perpendicular to a direction of the movement of a table (15). The cutting chips are collected in the troughs (39) through a plurality of chutes (47) which have openings inclined downward towards the troughs (39) and which are provided below the upper surface of the table 15, to be discharged to the outside through chip discharge means (41) disposed in the troughs (39).

Abstract: A machine tool with an improved capability of discharging and collecting the cutting chips is disclosed. A bed (13) is provided with troughs (39) extending through the bed (13) in a direction substantially perpendicular to a direction of the movement of a table (15). The cutting chips are collected in the troughs (39) through a plurality of chutes (47) which have openings inclined downward towards the troughs (39) and which are provided below the upper surface of the table 15, to be discharged to the outside through chip discharge means (41) disposed in the troughs (39).