Abstract: A skiving cutter includes a cutting edge portion in which a tooth trace extends in a direction inclined with respect to an axis of a base. The cutting edge portion is segmented into a plurality of segmented cutting edges by cutting edge grooves extending in a direction intersecting the tooth trace. One of the plurality of segmented cutting edges forms a reference cutting edge. Among the plurality of segmented cutting edges constituting the cutting edge portion, the reference cutting edge has the largest axis-cutting edge distance which is a distance from the axis to the outer circumferential cutting edge of the segmented cutting edge, and the remaining one or more segmented cutting edges have gradually smaller axis-cutting edge distances as a distance from the reference cutting edge to each of the remaining cutting edges increases. A helix angle is different according to positions of the plurality of segmented cutting edges.

Abstract: The main spindle unit has a main spindle, a front bearing, a rear bearing, a front case for covering the front bearing, and a rear case for covering the rear bearing. The front case has a front body part for holding the front bearing and a front flange part extending radially outward from the front body part. The rear case has a rear body part for holding the rear bearing and a rear flange part extending radially outward from the rear body part. A front mounted surface, which can be brought into contact with a first mounting surface of a unit support table, is formed on the front flange part so as to face the front side thereof. A rear mounted surface, which contacts a second mounting surface of the unit support table, is formed on the rear flange part so as to face the front side thereof.

Abstract: An abnormality-detecting device for detecting abnormalities of a tool of a machine tool comprises: an acquiring unit for acquiring multiple measured values relating to the tool as measurement data (vibration information, cutting force information, sound information, main shaft load, motor current, power value); a normal model unit for learning the measurement data acquired during normal machining by one class machine learning and creating a normal model; an abnormality-diagnosing unit for acquiring measurement data during machining after creation of the normal model while diagnosing whether said measurement data is normal or abnormal on the basis of the normal model; and a re-diagnosing unit for re-diagnosing measurement data, which has been diagnosed to be abnormal by the abnormality-diagnosing unit, by a method different from the abnormality-diagnosing unit.

Abstract: Provided is a substrate bonding method for bonding a first substrate (11) and a second substrate (12) by sputter-etching, the substrate bonding method comprising: an activation step in which the surface of a first substrate (11) is irradiated with a beam (2) of ion particles of a gas (1) such as Ar and sputter-etched to thereby deposit sputtered particles (Ms) from the first substrate (11) on the surface of a second substrate (12), the first substrate (11) comprising at least one among a semiconductor material, a compound semiconductor material, and a metal material; and a bonding step in which the surface of the second substrate (12), on which the sputtered particles (Ms) from the first substrate (11) are deposited, and the surface of the substrate (11), which is sputter-etched, are overlapped and bonded with each other.

Abstract: Provided is an internal gear grinding method that makes it possible to grind an internal gear having arc-shaped teeth in a short amount of time. To this end, an internal gear having arc-shaped teeth and a threaded grindstone with a barrel shape having blades with a shape corresponding to the arc shape of the teeth are engaged at a predetermined axis intersection angle, and the internal gear and the threaded grindstone are made to rotate in synchronization with each other so that the tooth surface of the internal gear is ground by the blade surface of the threaded grindstone.

Abstract: A gear cutting machine for gear cutting a workpiece (W) using a gear shaped cutter (17), by engaging and rotating the workpiece (W) that can rotate around a workpiece axis and a gear shaped cutter (17) that can rotate around a cutter axis, while cutting and feeding the gear shaped cutter (17), including: rough cutting at a cross axis angle to the cutter axis, then moving the cutter axis by moving a predetermined angle around the workpiece axis, and performing finish cutting such that the cutter axis has an angle with regard to the workpiece axis in a plane that includes the feeding axis direction and the cutting direction after moving.

Abstract: This cylindrical cutter for skiving comprises a plurality of cutting edge parts in the circumferential direction by having tooth grooves be formed between circumferentially adjoining cutting edge parts with the tooth grooves being formed into a helical shape twisting in the axial direction. Cutting edge grooves are each formed in the cutting edge parts so as to divide the cutting edge parts into multiple sections in the length direction of the tooth grooves.

Abstract: A dry machining apparatus includes: a tool that machine a workpiece; a first surface that is arranged below the tool and receives chips generated by the machining; a second surface that is arranged upper than the first surface; a third surface that connects the first surface and the second surface; and an air jet nozzle that has an air jet port which jets air toward a boundary portion between the second surface and the third surface from the second surface, and the air jet nozzle supplies at least a part of the air jetted from the air jet port to the first surface.

Abstract: A gear manufacturing machine for which a machining tool detachably attached to a tool spindle is exchanged by means of an automatic tool changer, wherein the automatic tool changer is provided with: tool holding means for detachably holding a machining tool to be exchanged; moving means for moving the tool holding means in a direction parallel to the axial direction of the tool spindle; and rotating means for rotating the tool holding means.

Abstract: A welding method for welding a cast iron (first member) and a steel (second member) having a lower hardness than the cast iron, which comprises: a first step for inserting an insert material (third member) having a lower hardness than the steel between the cast iron and the steel; a second step for welding the boundary portion between the cast iron and the insert material; and a third step for welding the boundary portion between the steel and the insert material. Consequently, this welding method is able to improve the strength characteristics after welding.

Abstract: A skiving cutter includes a cutting edge portion in which a tooth trace extends in a direction inclined with respect to an axis of a base. The cutting edge portion is segmented into a plurality of segmented cutting edges by cutting edge grooves extending in a direction intersecting the tooth trace. One of the plurality of segmented cutting edges forms a reference cutting edge. Among the plurality of segmented cutting edges constituting the cutting edge portion, the reference cutting edge has the largest axis-cutting edge distance which is a distance from the axis to the outer circumferential cutting edge of the segmented cutting edge, and the remaining one or more segmented cutting edges have gradually smaller axis-cutting edge distances as a distance from the reference cutting edge to each of the remaining cutting edges increases. A helix angle is different according to positions of the plurality of segmented cutting edges.

Abstract: This grinding wheel tool is provided with a cylindrically shaped head unit comprising a hollow area passing through the inside, and abrasive grains adhered across the entire outer peripheral surface of the head unit. A fluid is supplied in the hollow area, and in the head unit, communication holes are formed which communicate between the hollow area and the outer peripheral surface and which, from the radial direction of the head unit, are angled forwards in the direction of rotation. Hereby, it is possible to provide a grinding wheel tool which can greatly reduce clogging even in cases where a high amount of cutting chips are generated per unit time, such as in high-feed processing.

Abstract: There is provided a chip sweeping robot which is capable of possessing adaptability to various machine tools and automatically sweeping a wide range efficiently. To this end, a chip sweeping robot configured to sweep chips, which are scattered on an upper surface of a table of a machine tool at the time of machining a workpiece attached to the table, by traveling in accordance with a travel route set on the upper surface, includes: a robot body which autonomously travels on the upper surface; a rotating brush which sweeps the chips out forward in a traveling direction by being rotated from a lower side to an upper side forward in the traveling direction; and a blade which scoops out the chips, which pass through the rotating brush, forward in the traveling direction and sends the chips to a rotating region of the rotating brush.

Abstract: The present invention is provided with: a transmission winding portion having a positive-polarity loop and a negative-polarity loop alternately formed so as to partially overlap with each other in the extending direction of a scale, arrangement of the positive-polarity loop and the negative-polarity loop being adjusted such that the positive-polarity loop and the negative-polarity loop on both sides with respect to the intermediate position in the longitudinal direction of the transmission winding portion are inverted; a first reception winding that covers the transmission winding portion in the width direction of the scale, that has a length, corresponding to the cycle of the cycle pattern of the transmission winding portion, and that is formed into a rectangular pattern; a second reception winding having a shape symmetrical to the first reception winding with respect to the intermediate position in the longitudinal direction of the transmission winding portion.

Abstract: Provided is a processing inspection workpiece for a machine tool with which it is possible to inspect tool precision by subjecting the machine tool to on-machine measurement. Also provided is an on-machine measurement method using said workpiece. In a processing inspection workpiece, five surfaces, excluding a hexahedron bottom surface, function as processing surfaces, and multiple reference surfaces, which are in the same direction as the respective processing surfaces and for which multiple in-plane coordinates are already known, are disposed on each processing surface. A machine tool is subjected to on-machine measurement using said processing inspection workpiece.

Abstract: This device is provided with: a main shaft (20) onto which a tool (100) is detachably mounted; a rod (30) slidably supported by the main shaft (20) and configured to attach or detach the tool (100) to or from the main shaft (20) through a sliding action; a fluid channel (32) formed in the rod (30); fluid feed device (51, 70) configured to feed a fluid into the fluid channel (32); a plurality of fluid channels for seating detection (24) for detecting when the main shaft (20) and the tool (100) are in a seated state, the fluid channels for seating detection (24) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a first position; and a plurality of fluid channels for cleaning (25) for cleaning seating portions of the main shaft (20) and the tool (100), the fluid channel for cleaning (25) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a second position different from the f