Abstract: An additive manufacturing learning model generation apparatus is applied to a method for manufacturing a shaped article by radiating a light beam onto layered metal powder and heating the metal powder. The additive manufacturing learning model generation apparatus generates a learning model for determining a manufacturing condition or for estimating a shaped article status through machine learning that uses the manufacturing condition and the shaped article status as learning data. The shaped article status is related to the shaped article when the light beam is radiated or after the light beam is radiated.

Abstract: A sensor device that can reduce an assembly error of a magnetic sensor with respect to holders is provided. Magnetic sensors are disposed between first magnetism collection portions and second magnetism collection portions with a first holder and a second holder assembled to each other. A circuit board recessed portion of the second holder is provided with positioning protrusions that extend toward the first holder. A circuit board, on which the magnetic sensors are mounted, is provided with through holes. The magnetic sensors are integrally assembled to the second holder in advance with the positioning protrusions inserted through the through holes.

Abstract: A grinding quality estimation model generating device includes a measured data acquiring unit configured to acquire measured data in a predetermined period for each of a plurality of workpieces, the measured data being data measured when grinding of the workpiece is performed using a grinding wheel in a grinding machine, and the measured data being at least one of first measured data indicating a state of a structural member of the grinding machine and second measured data associated with a grinding region; and a first learning model generating unit configured to generate a first learning model for estimating grinding quality of the workpiece by machine learning using the measured data associated with the plurality of workpieces as first learning input data.

Abstract: A grinding apparatus includes grinding wheel side vibrational displacement calculation devices that obtain a vibrational displacement of a grinding wheel resulting from a vibration in an approaching/separating direction of the grinding wheel; main spindle side vibrational displacement calculation devices that obtain a vibrational displacement of a workpiece generated by propagation of the vibration in the approaching/separating direction of the grinding wheel; a relative vibrational displacement calculation unit that obtains a relative vibrational displacement between the grinding wheel and the workpiece based on the vibrational displacement of the grinding wheel and the vibrational displacement of the workpiece that have been obtained; a position change unit that creates, based on the obtained relative vibrational displacement between the grinding wheel and the workpiece, a position change command to change a position of the wheel spindle stock; and a processing controller that grinds the workpiece W based o

Abstract: A differential apparatus includes a differential gear mechanism in which side gears mesh with pinion gears, a pinion shaft that rotatably supports the pinion gear, a slide member that supports the ends of the pinion shaft, and pinion gear washers each disposed between the slide member and a corresponding one of the pinion gears. Movement of each pinion gear washer toward the slide member in the axial direction of the pinion shaft is restricted. When a force of the pinion gear pressing the pinion gear washer toward the slide member is less than a predetermined value, a clearance is formed between the slide member and the pinion gear washer. When the force of the pinion gear pressing the pinion gear washer toward the slide member is greater than the predetermined value, the outer surface of the pinion gear washer abuts the inner surface of the slide member.

Abstract: A sealed thrust bearing includes an inner ring; an outer ring facing the inner ring in an axial direction; an elastic member that covers the inner ring so as to define; an inner elastic seal member that seals a space between an inner circumferential portion of the inner ring and an inner circumferential portion of the outer ring; and an outer elastic seal member that seals a space between an outer circumferential portion of the inner ring and an outer circumferential portion of the outer ring; and a lower member that is disposed below the outer ring for being assembled with the outer ring, and is provided with cation coating. The inner elastic seal member has a lip in pressure contact with an inner surface of one of a cylinder portion and a cylindrical portion of the lower member, and the outer elastic seal member has a lip in pressure contact with an upper surface of one of an annular ring portion and an annular portion of the lower member.

Abstract: A rolling bearing device includes a rolling bearing, partially submerged in lubricating oil stored in an oil pocket provided in a vertically lower portion of a housing to a level corresponding to a part of an annular space, an annular shielding member, and an annular seal component. The shielding member has an oil drain portion for drainage of the lubricating oil in the annular space to the outside of the rolling bearing at a vertical level above an oil level of the lubricating oil stored in the oil pocket when the rotary shaft is stationary The oil drain portion has an inclined groove having an inclined surface inclined away from the rolling bearing and an opening provided in an outer end portion at a distal end of the inclined surface. The inclined groove is tapered toward a vertical top of the shielding member when viewed in the axial direction.

Abstract: Provided is a motor device capable of detecting entry of water into a housing before a control circuit is submerged. A first motor bus bar includes a first U-phase motor bus bar, a first V-phase motor bus bar, and a first W-phase motor bus bar. A first control circuit is connected to the first motor bus bar. The first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar are disposed on the lower side with respect to the first control circuit in a gravity direction. The first control circuit detects entry of water into a motor housing of the motor device, based on the status of power supply to the first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar.

Abstract: Provided is a motor controller in which a total motor torque can be changed at a constant rate if maximum torques that can be generated by winding groups of a plurality of systems lose their balance. An upper limit of a first assist control amount for a first winding group or a second assist control amount for a second winding group may be limited to a value smaller than the original upper limit. In this case, an ECU calculates the first assist control amount and the second assist control amount so that the first assist control amount and the second assist control amount reach their upper limits at the same timing relative to changes in absolute values of steering torques.

Abstract: A steering angle calculation circuit of an ECU includes a neutral point calculation circuit, a correction amount calculation circuit, an adder, and an absolute angle calculation circuit. When started, the neutral point calculation circuit calculates a motor neutral point from a steering angle detected through a steering sensor and a motor rotation angle detected through a relative angle sensor. The correction amount calculation circuit calculates a correction angle that is a difference between a conversion value and an actual value of the motor rotation angle with respect to the steering angle. The conversion value is obtained by converting the steering angle in terms of the motor rotation angle by taking into account a theoretical specific stroke. The adder calculates a final motor neutral point by adding the correction angle calculated by the correction amount calculation circuit to the motor neutral point calculated by the neutral point calculation circuit.

Abstract: A current command value calculation circuit includes an end abutment determination circuit and a guard processing circuit. When a decrease amount of an induced voltage value within a predetermined time is equal to or larger than a predetermined decrease amount in the state that a steering torque is equal to or larger than a predetermined torque, the end abutment determination circuit determines that the end abutment occurs. When a determination signal indicating that the end abutment state does not occur is input, the guard processing circuit outputs an elemental current command value directly as a q-axis current command value. When a determination signal indicating that the end abutment state occurs is input, the guard processing circuit outputs, as the q-axis current command value, a value obtained by limiting the elemental current command value so that its absolute value is equal to or lower than a predetermined limit current value.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage in which a plurality of pockets that accommodate the balls are formed along the circumferential direction. The cage is a snap cage that has an annular body provided on one side in an axial direction, and a plurality of prongs provided so as to extend from the annular body toward the other side in the axial direction. Spaces on the other side of the annular body in the axial direction and between the prongs which are adjacent to each other in the circumferential direction serve as the pockets. A pocket surface of the pocket that faces the ball is a part of a spherical surface. The cage can contact the inner peripheral side of the outer ring for positioning in the radial direction.

Abstract: A heat treatment apparatus that thermally treats an annular workpiece formed of a steel material by inductively heating the workpiece includes a treatment tank in which the workpiece is set and thermally treated, a holding portion that holds the workpiece at a predetermined position, an induction heating coil that surrounds the workpiece to inductively heat the workpiece, and a cooling medium that cools surfaces of the workpiece during the induction heating of the workpiece.

Abstract: A rolling bearing for a sliding door includes an inner ring, an outer ring, a plurality of rolling elements arranged in a rollable manner in an annular space between the inner ring and the outer ring, and a jacket member formed of a resin composition and provided so as to cover the outer peripheral surface of the outer ring. The resin composition contains polyamide 66 and aramid fiber. The polyamide 66 has a number average molecular weight of 34000 to 60000. The number average molecular weight is measured by gel permeation chromatography using hexafluoroisopropanol (HFIP) as a solvent and poly (methyl methacrylate) (PMMA) as a reference material. The content of the aramid fiber is 5 to 25 mass %.

Abstract: A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion on the other axial side, and a plurality of column portions. A radial inner surface of the column portion is provided along a second virtual taper surface that is in the vicinity of a first virtual taper surface including a center line of the plurality of taper rollers, across the entire length in the longitudinal direction of the column portion.

Abstract: Provided is a steel for carbonitrided bearing which excels in hardenability and also excels in toughness, wear resistance, and surface-originated flaking life after quenching and tempering. A steel for carbonitrided bearing of the present embodiment has a chemical composition containing, in mass %, C: 0.22 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). 1.20<0.4Cr+0.4Mo+4.5V<2.60??(1) 2.7C+0.4Si+Mn+0.8Cr+Mo+V>2.

Abstract: A columnar rotator support shaft supports a planet gear that is a rotator, and has a raceway surface formed on the outer peripheral surface of the rotator support shaft so that a plurality of rollers roll on the raceway surface. The rotator support shaft includes a hollow portion formed so as to be recessed in an axial direction from both axial end faces, a plug serving as a sealing member that seals at least one of openings of the hollow portion at both the end faces, an oil inlet passage through which lubricating oil is supplied into the hollow portion sealed with the plug, and an oil outlet passage through which the lubricating oil in the hollow portion is supplied to the raceway surface. The oil outlet passage passes through the rotator support shaft from the raceway surface to the sealed hollow portion.

Abstract: A contact state detection device that detects the state of contact with a steering wheel of a vehicle steering device includes: a torque sensor that detects torque generated in a steering shaft; a rotational angle sensor that detects the amount of rotation of the steering wheel; a contact sensor that detects whether or not the steering wheel is contacted; and a determination unit that determines which of a hands-on state and a hands-off state is established for the steering wheel based on the results of detection by the torque sensor, the rotational angle sensor, and the contact sensor.

Abstract: A method of manufacturing a damping device, notably for a steering tie rod, the said device comprising a rod which extends along a main axis and which is intended to be connected to a first mechanical component, a securing portion which surrounds the said rod and which is intended to be connected to a second mechanical component, and a sleeve made of elastomeric material which is arranged between the rod and the fixing bushing so as, through elastic deformation thereof, to allow at least axial movement of the fixing bushing with respect to the rod, in which method the fixing bushing is offset axially with respect to the rod to force the elastic deformation of the sleeve and the introduction of a corresponding preload, then the sleeve is locked so as to keep it, when the device is at rest, in a state of permanent axial elastic deformation and preload.

Abstract: A control apparatus controls driving of an oil feeding unit. The oil feeding unit includes a piezoelectric body that deforms in response to a voltage applied thereto, and a reservoir to store lubricating oil. The capacity of the reservoir changes in accordance with deformation of the piezoelectric body so as to discharge lubricating oil from the oil feeding unit. The control apparatus includes N driving circuits 71a to 71n configured to apply voltages to the piezoelectric body (where N is an integer equal to or greater than two). The N driving circuits 71a to 71n are connected in parallel to the piezoelectric body. During oil feeding, the control apparatus uses a predetermined number of the driving circuits selected from the N driving circuits. The predetermined number is smaller than N.