Abstract: A powered tool includes a housing, a drive source, a drive body, a sealing part, and a holding part. The drive source is rotatable in the housing. The drive body is supported in the housing and reciprocatable by a driving force of the drive source. The sealing part is in contact with an outer peripheral surface of the drive body. The holding part is positioned around the drive body. The holding part surrounds the sealing part and supports the sealing part to be in contact with the outer peripheral surface of the drive body. The holding part includes a lubrication oil accommodating part retaining a lubricant supplied to the outer peripheral surface of the drive body.

Abstract: A rare earth sintered magnet has a main phase and a grain boundary phase, the main phase has an R2Fe14B crystal structure, rare earth elements R include at least Nd and Sm, and the content of Sm is higher in the main phase than in the grain boundary phase. The rare earth elements R may include La. In this manner, the higher content of Sm in the main phase than in the grain boundary phase suppresses the heat generation of the rare earth sintered magnet due to eddy current loss.

Abstract: A rare earth sintered magnet according to the present disclosure includes: a main phase satisfying general formula (Nd, La, Sm)—Fe—B and including crystal grains based on R2Fe14B crystal structures; and a crystalline subphase based on an oxide phase represented by (Nd, La, Sm)—O. The subphase has a higher concentration of Sm than the main phase.

Abstract: A flush toilet according to an embodiment includes a bowl part and a water storage part. The bowl part receives waste. The water storage part is formed on a bottom of the bowl part and is connected to a discharge channel. A first region that is connected to a discharge channel and a second region that is located on a front side of the first region are formed in the water storage part. A curvature of a curved surface of the water storage part that forms the first region in upward and downward directions is different.

Abstract: Provided is a rare earth magnet alloy having a tetragonal R2Fe14B crystal structure, including: a main phase containing, as main constituent elements, at least one kind selected from the group consisting of: Nd; La; and Sm, Fe, and B; and a sub-phase containing, as main constituent elements, at least one kind selected from the group consisting of: Nd; La; and Sm, and O, wherein La substitutes for at least one of a Nd(f) site or a Nd(g) site, wherein Sm substitutes for at least one of a Nd(f) site or a Nd(g) site, wherein La segregates in the sub-phase, and wherein Sm is dispersed in the main phase and the sub-phase without segregation.

Abstract: A shielding gas nozzle for metal forming includes a wire feed line being a path to feed a wire at an inclination angle ?, a first gas ejection hole to jet a shielding gas at an angle equal to or less than the inclination angle ?, and a second gas ejection hole to jet the shielding gas in a direction different from that of the first gas ejection hole. The first gas ejection hole jets the shielding gas toward an intersection along a direction in which the absolute value of the angle to the wire feed direction is less than 90 degrees, and the second gas ejection hole jets the shielding gas toward the intersection along a direction in which the absolute value of the angle to the wire feed direction when viewed in the direction perpendicular to the base material surface is greater than 90 degrees.

Abstract: A shielding gas nozzle for metal forming includes a wire feed line being a path to feed a wire at an inclination angle ?, a first gas ejection hole to jet a shielding gas at an angle equal to or less than the inclination angle ?, and a second gas ejection hole to jet the shielding gas in a direction different from that of the first gas ejection hole. The first gas ejection hole jets the shielding gas toward an intersection along a direction in which the absolute value of the angle to the wire feed direction is less than 90 degrees, and the second gas ejection hole jets the shielding gas toward the intersection along a direction in which the absolute value of the angle to the wire feed direction when viewed in the direction perpendicular to the base material surface is greater than 90 degrees.

Abstract: A metal-joining structure (100) includes: an iron alloy part (1); an aluminum alloy part (2); and a joining interface layer (3) provided between the iron alloy part (1) and the aluminum alloy part (2). The joining interface layer (3) includes: an iron-silicon solid-solution-phase sublayer (4) in contact with the iron alloy part (1); an aluminum-silicon eutectic-phase sublayer (5) in contact with the aluminum alloy part (2); and a silicon sublayer (6) provided between the iron-silicon solid-solution-phase sublayer (4) and the aluminum-silicon eutectic-phase sublayer (5).

Abstract: An additive manufacturing apparatus includes: a material supply unit that supplies a build material to a process area of an additive target surface; an irradiation unit that irradiates the process area with a laser beam that melts the build material; and a control device that controls the material supply unit and the irradiation unit for creating at least a part of an object using a dot-shaped bead, the dot-shaped bead being formed of the build material melted by radiation of the laser beam. The additive manufacturing apparatus can improve the shape accuracy of the object.

Abstract: A metal-joining structure (100) includes: an iron alloy part (1); an aluminum alloy part (2); and a joining interface layer (3) provided between the iron alloy part (1) and the aluminum alloy part (2). The joining interface layer (3) includes: an iron-silicon solid-solution-phase sublayer (4) in contact with the iron alloy part (1); an aluminum-silicon eutectic-phase sublayer (5) in contact with the aluminum alloy part (2); and a silicon sublayer (6) provided between the iron-silicon solid-solution-phase sublayer (4) and the aluminum-silicon eutectic-phase sublayer (5).

Abstract: A flush toilet according to an embodiment includes a bowl part and a water storage part. The bowl part receives waste. The water storage part is formed on a bottom of the bowl part and is connected to a discharge channel. A first region that is connected to a discharge channel and a second region that is located on a front side of the first region are formed in the water storage part. A curvature of a curved surface of the water storage part that forms the first region in upward and downward directions is different.

Abstract: A method for manufacturing a discharge surface treatment electrode includes: a first laying of laying powder particles to form a first powder layer; and a first binding of binding some of the powder particles in the first powder layer to each other. The method further includes: a second laying of further laying the powder particles on the first powder layer in which some of the powder particles are bound to each other to form a second powder layer; and a second binding of binding some of the powder particles in the second powder layer to each other to form a stacked body of granulated particles. A region having a different porosity from another region is formed inside the stacked body.

Abstract: An additive manufacturing apparatus includes: an irradiation unit that irradiates a feeding position with a laser beam that melts a build material; a numerical control device that is a control unit that performs control for building a deposit by stacking beads on a substrate; and an arithmetic device that is an arithmetic unit that executes an arithmetic process of computing parameters for the control unit to perform the control unit. The beads, which are two beads stacked on each other, are a first bead and a second bead stacked on the first bead. The first bead is formed earlier than the second bead. The feeding position is a first position in formation of the first bead. The feeding position is a second position in formation of the second bead. On a basis of a width of the first bead and a diameter of the laser beam, the arithmetic unit calculates an interval between the first position and the second position in a set direction that is a direction of the width of the first bead.

Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.

Abstract: A method for manufacturing a discharge surface treatment electrode includes: a first laying of laying powder particles to form a first powder layer; and a first binding of binding some of the powder particles in the first powder layer to each other. The method further includes: a second laying of further laying the powder particles on the first powder layer in which some of the powder particles are bound to each other to form a second powder layer; and a second binding of binding some of the powder particles in the second powder layer to each other to form a stacked body of granulated particles. A region having a different porosity from another region is formed inside the stacked body.

Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.

Abstract: A method for forming a surface layer, the purpose thereof is to form a high erosion resistant film. The method for forming a surface layer includes: arranging a member (2) in a machining fluid (3); and forming the surface layer including silicon by spacing a silicon electrode (1) from the member (2) at a predetermined distance, and by supplying silicon component from the silicon electrode (1) to the member side by applying a predetermined voltage and generating electric discharge, and an iron-based metal texture including silicon of 3 to 11 wt % is formed at a thickness of 5 to 10 ?m at a portion to be treated by repetitively generating a electric discharge pulse in which a time integration value of a current value of the electric discharge pulse is in a range of 30 A·?s to 80 A·?s.

Abstract: A method for forming a surface layer, the purpose thereof is to form a high erosion resistant film. The method for forming a surface layer includes: arranging a member (2) in a machining fluid (3); and forming the surface layer including silicon by spacing a silicon electrode (1) from the member (2) at a predetermined distance, and by supplying silicon component from the silicon electrode (1) to the member side by applying a predetermined voltage and generating electric discharge, and an iron-based metal texture including silicon of 3 to 11 wt % is formed at a thickness of 5 to 10 ?m at a portion to be treated by repetitively generating a electric discharge pulse in which a time integration value of a current value of the electric discharge pulse is in a range of 30 A·?s to 80 A·?s.

Abstract: Using electrical discharge surface treatment of moving an electrode material to a work piece by repeatedly generating pulsed electrical discharge between an electrode for electrical discharge surface treatment (1) containing Si as a main component and a work piece (2) surface in order to form a surface layer excellent in an anti-corrosion property and an anti-erosion property which is useful in applications to anti-corrosion and anti-erosion parts, a surface layer formed with an amorphous structure, in which an Si component is contained in a range of 3 to 11 wt % and which has a thickness of 5 to 10 ?m, is formed on the work piece (2) surface.

Abstract: A discharge surface treatment apparatus supplies an electrode material to a surface of a treatment target member by generating pulsating discharges across an inter-electrode gap to form a coating of the electrode material, and includes a switching element that turns application of a voltage from a power source to the inter-electrode gap on/off, a capacitance element that is connected to the switching element in parallel with the inter-electrode gap, an inductance element that is connected in series between both of the switching element and the capacitance element and the inter-electrode gap, and a control unit that includes a function of periodically performing on/off so that an induced electromotive force generated in the inductance element due to a change in the current of discharge generated across the inter-electrode gap can be used as a voltage that induces the next discharge.