Abstract: This machine tool is provided with: a sensor (30-1, 30-2, 30-3, 30-4) which is disposed in the vicinity of an opening for loading a workpiece and which measures the motion of an object approaching the opening; a storage unit (18) storing a rule for classifying non-processing time into setup time and non-setup time on the basis of the motion of the object relative to the sensor; a determination unit (14) which, when a processing program is not being executed, determines whether the current state of the machine tool corresponds to setup time or non-setup time on the basis of the motion of the object and the rule stored in the storage unit; and an output unit (20) which produces an output indicating whether the current state of the machine tool corresponds to setup time or non-setup time.

Abstract: The invention relates to an apparatus 100 for machining a workpiece with a laser beam 101 coupled into a fluid jet. The apparatus 100 comprises a laser unit 101a for providing the laser beam 101, a nozzle unit 102 with an aperture 102a for producing the fluid jet, and an optical unit 103 configured to provide the laser beam 101 from the laser unit 101a onto the nozzle unit 102. Further, the apparatus 100 comprises a control unit 104 configured to control 108, 110 the optical unit 103 and/or nozzle unit 102 to change a point of incidence 109 of the laser beam 101 on the nozzle unit 102. The apparatus 100 also comprises a sensing unit 105 configured to sense laser light 106 reflected from a surface 102b of the nozzle unit 102 and produce a sensing signal 107 based on the sensed reflected laser light 106.

Abstract: A milling tool is configured from a shank part and a head with a cutting edge that is provided on the leading end of the shank part. The head comprises an expanding diameter section, the diameter of which expands gradually from the base end that contacts the shank part in the direction of the leading end, and a decreasing diameter section, the diameter of which gradually decreases from the maximum diameter section in the direction of the leading end. At least one cutting edge is provided on each of the expanding diameter section and the decreasing diameter section.

Abstract: The object of the present invention is to make it possible to maintain a stable electric discharge and to achieve a stable quality and machining performance even when a work having a non-uniform composition is machined. A wire electric discharge machining device performs electric discharge machining on a work while controlling an inter-electrode distance between a wire and the work based on an inter-electrode voltage between the wire and the work so as to match a set target voltage. The wire electric discharge machining device includes an inter-electrode voltage measuring unit that measures the inter-electrode voltage, an actual amplitude calculating unit that calculates an amplitude of the measured inter-electrode voltage, and a target voltage correcting unit that corrects the target voltage in such a way that the calculated amplitude approaches the target amplitude that is set to a value larger than zero.

Abstract: In a T-shaped tool (10) in which a head (30) having cutting edges (36, 38) and a cylindrical shank (20) are fastened together: the shank comprises a super-hard alloy, and an engaging portion which engages with a tool main body is formed in a distal end portion thereof; the tool main body comprises a steel material, and an engaged portion which engages with the engaging portion of the shank is formed therein; and the engaging portion and the engaged portion are fastened in such a way as to be retained and prevented from rotating.

Abstract: This tool conveying device is provided with an indexing device comprising an input shaft, a first output shaft, and a second output shaft which is positioned adjacent and parallel to the first output shaft, wherein the input shaft is linked to a servo motor, the first output shaft rotates during rotation of the input shaft and the second output shaft stops at a prescribed angular position in a certain period during rotation of the input shaft and rotates in the remaining period during said rotation of the input shaft; a gripper; a turning part which is driven by the second output shaft of the indexing device and which supports the gripper; and a gripper opening/closing member which is driven by the first output shaft of the indexing device.

Abstract: A power supply device for an electric discharge machine includes a DC power supply which is connected in parallel to an electrode gap, a plurality of switching elements which are in parallel to each other and which are arranged between the electrode gap and the DC power supply, a current value acquisition unit for acquiring a value of a current, and an ON-OFF control unit which, during the time when the current value reaches a predetermined value until the time when the current starts to fall, sets a cycle for switching the plurality of switching elements from off to on to the same cycle, switches the plurality of switching elements from off to on in a predetermined order for each timing of a phase of 90°, which is 360° divided by the number of the plurality of switching elements, sets an ON-period of each of the plurality of switching elements based on a difference between the value of the current and the predetermined value, and performs ON-OFF control of the plurality of switching elements based on the cyc

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: This machine tool is provided with an arm for exchanging a tool between a main shaft in a machining chamber and a secondary tool standby position in a tool holding chamber, a shutter which is provided in an opening defined in a wall which partitions between the machining chamber and the tool holding chamber, a first motor for opening and closing the shutter, a shutter position detector which can detect the position of the shutter in the entire range between the fully open position and the fully closed position, a storage device which stores a prescribed position of the shutter associated with a prescribed operation of the arm and a control device which is configured to perform a prescribed operation of the arm on the basis of the position of the shutter detected by the shutter position detector and the prescribed position of the shutter stored in the storage device.

Abstract: A power supply device for an electric discharge machine includes a current supply unit for supplying a pulsed current to an electrode gap and a current regeneration unit for regenerating the current. The current supply unit includes a DC power supply, a first switching element, and a second switching element. The current regeneration unit includes a capacitor arranged between a first connection point between an electrode and the first switching element and a second connection point between a workpiece and the second switching element, and a third switching element which is arranged between a third connection point between the first connection point and the DC power supply and a fourth connection point between the second connection point and the capacitor and which is turned on from the start of current regeneration until the current value reaches zero, whereby regeneration current fall time is reduced.

Abstract: A tool (T) is provided with: a shaft-like tool body (11) having a first end portion (11a) extending along a central axis line (Ot) and attached to a main shaft, and a second end portion (11b) on an opposite side to the first end portion (11a); and a fore end portion (12) connected to the second end portion (11b) of the shaft-like tool body (11). The fore-end portion (12) includes a central portion (13) including a fore-end face (17) of the tool (T), and a plurality of blade portions (14) protruding radially outward from the central portion (13). A cutting blade of each blade portion (14) includes a main cutting blade (15) adjacent to the fore-end face (17). The main cutting blade (15) includes an outline that forms an angle of 30-150 degrees with respect to the central axis line (Ot) in a cross-sectional view including the central axis line (Ot).

Abstract: This machining program generation device is provided with: a storage unit that stores machining conditions for respective tool regions determined on the basis of the number of effective edges in a multi-blade tool; a contact region calculation unit that calculates a tool region which comes into contact with a workpiece during machining on the basis of the shapes of the workpiece and the edge portion of the tool and of a tool path; and a machining program generation unit that generates a machining program on the basis of the tool path and the machining conditions stored in the storage unit in association with the tool region coming into contact with the workpiece.

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: Provided is a tool path generation method for generating a tool path (Tp), along which a workpiece is machined as a tool (T) moves over a tool movement curved surface (So) generated along a work surface of the workpiece. In this method: a scanning policy is set, which is a rule for establishing a path along which the tool is to move over the tool movement curved surface (So); a dividing line (Cd) is disposed on the tool movement curved surface (So); and the location of an intersection of the dividing line and a trajectory of the tool moving over the tool movement curved surface is calculated on the basis of the scanning policy. A tool path is generated, the path being represented by a movement command for curve interpolation using a curve that passes through the location of the intersection.

Abstract: An electronic manual system for a machine tool: generates an inquiry code on the basis of information relating to a user including a manufacture number of a machine tool; refers, on the basis of the inquiry code, to a user information database in which information relating to the machine tool and user identification information are associated with each other and stored; acquires, from an instruction manual database which stores electronic data of an instruction manual for the machine tool possessed by the user, a corresponding electronic manual; and displays the electronic manual on a manual display terminal.

Abstract: A milling tool is configured from a shank part and a head with a cutting edge that is provided on the leading end of the shank part. The head comprises an expanding diameter section, the diameter of which expands gradually from the base end that contacts the shank part in the direction of the leading end, and a decreasing diameter section, the diameter of which gradually decreases from the maximum diameter section in the direction of the leading end. At least one cutting edge is provided on each of the expanding diameter section and the decreasing diameter section.

Abstract: A narrow-hole electric discharge machine (100) is provided with: a pump (52) with a variable flow rate that supplies machining fluid to a pipe electrode (28); a flow rate sensor (56) provided in a pipe between the pump (52) and the pipe electrode (28), the flow rate sensor (56) being configured to detect the flow rate of the machining fluid flowing through the pipe; a storage unit (58b) that stores a set flow rate of a jet flow suitable for each cross-sectional size of a plurality of pipe electrodes (28) having different cross-sectional sizes; and a pump control unit (58a) that drives the pump (52) such that the value detected by the flow rate sensor (56) is kept at the set flow rate stored in the storage unit (58b) suitable for the cross-sectional size of the pipe electrode (28) currently attached to a main shaft (114).

Abstract: A main spindle device for a machine tool has a hollow main spindle, which is supported by a housing such that the hollow main spindle can rotate. The main spindle device is provided with: an annular cylinder, which is fixed to the housing, and is formed extending into the main spindle, said annular cylinder having an opening formed in the axis line direction of the main spindle; and a cooling path formed on the outer circumferential surface of the cylinder to face the inner circumferential surface of the main spindle.

Abstract: A workpiece gripping device (10) for securing a workpiece (90) on a table 114 of a machine tool (100) is provided with a workpiece gripping unit (20) having at least three claws (12) which are disposed at equal intervals around a central axis (Oc) to secure an outer peripheral part of the workpiece, a bar gripping member (38) which is mounted on the central axis (Oc), and grips a bar (260) inserted into the workpiece (90) along the central axis (Oc), and a retraction mechanism (64) for retracting the bar gripping member (38) along a central axis (O) toward a table side.

Abstract: A parameter indicating a surface property of an object surface is plotted on the horizontal axis, a normal direction change rate of the shape of the object surface is plotted on the vertical axis, the minimum normal direction change rate visible to a person is associated with the parameter indicating the surface property of the object surface to create a visible area map, the relationship between the parameter indicating the surface property of a machining surface of a workpiece, and the maximum value of the normal direction change rate of the shape of the machining surface of the workpiece is displayed on the visible area map, and the object surface is evaluated.