Abstract: A method measuring a residual stress of a fillet portion, where an angle of incidence of X-rays denoted by ? [°], a fillet radius denoted by R [mm], a fillet angle denoted by ? [°], a vertical width of a housing of an X-ray stress measuring apparatus denoted by W [mm], a width of a detection region of a two-dimensional detector denoted by D [mm], a complementary angle of a Bragg angle denoted by ? [°], and an interval between a flange portion and an imaginary straight line which passes through a fillet center and is parallel to the flange portion denoted by a [mm], formula 1 is satisfied; when ? ? 0, an irradiation distance L [mm] of the X-rays, the irradiation distance L satisfies formula 2; and when ? < 0, the irradiation distance L satisfies formula 3.
Abstract: A battery case, including a cross member between a pair of opposing wall surfaces of an inner peripheral surface of a rectangular frame body to partition an inside space surrounded by a frame body, and a bonding assistance member between each end portion of the cross member and each of the wall surfaces of the frame body facing the end portion. One end portion of the bonding assistance member is welded to the wall surface, and the bonding assistance member has an overlap portion extending from the one end portion toward the inside space and overlapping with a side surface of the end portion of the cross member.
Abstract: A method for manufacturing an additively-manufactured object includes a depositing planning step of creating a depositing plan and a building step of repeatedly depositing the weld beads based on the depositing plan. The building step includes a frame portion building step of building a frame portion and an internal building step of building an internal building portion. The internal building step includes a pre-measurement process of measuring a shape of a base on which the weld bead layer is to be deposited, a deviation amount calculation process of creating a measured profile of the base based on the measured shape of the base, determining a planned profile of the base based on the depositing plan, and calculating a deviation amount of the measured profile with respect to the planned profile, and a pre-correction process of correcting a welding condition of the weld beads.
Abstract: A defect occurrence prediction method uses a mathematical model to associate input information, which includes various items, namely the material of a built object, welding conditions for welding beads, and a welding track; and output information, which includes defect information regarding the built object where additive manufacturing has been performed under the conditions in the input information. This mathematical model is used to create a database, and the defect information regarding the built object is found by searching the database, and the defect information is then presented. Each item of the input information includes a plurality of input subitems that are mutually different. The output information includes a plurality of individual defect information items which correspond respectively to the input subitems. When the mathematical model is generated, the respective input subitems of the input information are associated with the individual defect information items via the mathematical model.
Abstract: Disclosed is a high-strength steel sheet having predetermined chemical components, and microstructures of the steel sheet satisfies that: a fraction of MA in all steel microstructures being more than 0% and 15.0% or less by area ratio; a fraction of a soft ?-phase microstructure in the all steel microstructures being 0% or more and 50% or less by area ratio; and a standard deviation of an equivalent circle diameter of retained austenite being greater than 0.155 ?m.
Abstract: A method for manufacturing an additively-manufactured object incudes a groove portion processing step, a groove portion closing step, and a building step. In the groove portion processing step, a groove portion is formed by cutting an outer periphery of the shaft body. In the groove portion closing step, a first weld bead is formed along the groove portion on an edge portion of the groove portion in a shaft body to close the groove portion to form a hollow portion. In the building step, a built-up portion is built by depositing a second weld on the outer periphery of the shaft body.
Abstract: A method for manufacturing a joint structure formed by joining a first plate-shaped member and a second plate-shaped member having a shape that is longer in a longitudinal direction than in a lateral direction includes overlapping the first plate-shaped member and the second plate-shaped member, after the overlapping, joining each of both edge portions of the second plate-shaped member by forming a weld metal along the longitudinal direction to the first plate-shaped member. The weld metal extends further outward in the lateral direction than the edge portions of the second plate-shaped member, in which the weld metal is formed by a hybrid welding in which a laser is added as a heat source during arc welding such that the weld metal extends around both of the edge portions of the second plate-shaped member along the longitudinal direction.
Abstract: A sensor protecting case is provided with a case main body for housing a sensor main body and a sensor input portion, and a centralized cooling portion that is partitioned off by a partition so as to include at least part of the sensor input portion, and constitutes an independent space within the case main body. The case main body has a first gas inflow port for causing gas to flow into the case main body, and a first gas outflow port for causing the gas to flow out of the case main body. The partition has a second gas inflow port that is connected to the first gas inflow port to cause the gas to flow into the centralized cooling portion, and a second gas outflow port for causing the gas to flow out of the centralized cooling part into the case main body.
Abstract: A method for setting a fabrication condition for performing additive fabrication of an object on the basis of fabrication shape data of the object, the method including: a dividing step for dividing a shape indicated by the fabrication shape data into elements of a predetermined unit size; a partitioning step for partitioning, with respect to each of a plurality of cross sectional shapes in a fabrication direction, the elements constituting the cross sectional shape according to prescribed position type; and a setting step for setting, with respect to each of regions partitioned in the partitioning step, the fabrication condition from among additive patterns defined corresponding to the position type.
Abstract: The present invention has: a setting step for setting lamination patterns respectively for an outer edge portion and an inner portion of a shape indicated by shaping data; and an adjustment step for adjusting a forming sequence such that, during manufacturing when the lamination patterns are used to laminate and thereby form the outer edge portion and the inner portion, the height of the already laminated outer edge portion is higher than the height of the inner portion that is being newly laminated. In the lamination patterns, the orientation of the heat source when a region positioned at a boundary with the outer edge portion is formed is set so as to be inclined at a prescribed angle toward the outer edge portion in a plan perpendicular to a movement direction of the heat source.
Abstract: A building plan assistance method by which a mathematical model is used to associate input information, including the respective items of the material of a build object, a weld condition of weld beads, and a weld track, with output information including a characteristic value of the build object when additively manufactured under the condition of the input information, and a database is created using the mathematical model. The database is searched for a build object material, a weld condition, and a weld track corresponding to a target characteristic value of the build object to be manufactured, and the obtained build object material, weld condition, and weld track are presented. In the creating of the database, each of input sub-items of the input information items is associated with an individual characteristic value of the output information by means of the mathematical model.
Abstract: A strand production apparatus configured to produce a fiber reinforced resin strand having one or a plurality of fiber bundles including reinforcing fibers includes a twisting unit, a resin bath unit, and a winding unit. The twisting unit rotates the one or the plurality of fiber bundles around an axis of the one or the plurality of fiber bundles to form one or a plurality of twisted fiber bundles. In the resin bath unit, the one or the plurality of twisted fiber bundles are impregnated with a molten resin to form a fiber reinforced resin strand. The winding unit winds the fiber reinforced resin strand. The twisting unit is disposed on an upstream side of the resin bath unit in a conveying direction of the one or the plurality of fiber bundles.
Abstract: A system for manufacturing an additively-manufactured object obtained by depositing weld beads based on a depositing plan, the system includes: a torch that is provided on a robot arm; a first measurement unit that is mounted on the torch and that directly measures, in a non-contact manner, a base shape of a base portion on which the weld beads are deposited; a second measurement unit that measures at least one of a current, a voltage, and a filler metal supply rate when the weld beads are deposited, and estimates the base shape from history change thereof; and a control unit that selects at least either of a measurement result by the first measurement unit or by the second measurement unit and corrects control of at least one of the robot arm, the current, the voltage, and the filler metal supply rate.
Abstract: A modeling condition setting method which performs additive manufacturing of an object, on the basis of modeling shape data on the object, and includes a disassembly step for disassembling the shape indicated by the modeling shape data into a plurality of elements with predetermined element shapes; a setting step for setting a laminated pattern for each of the plurality of elements; and an adjustment step for adjusting the formation order of beads constituting each of the plurality of elements, for each predetermined unit height.
Abstract: A machine learning device that performs machine learning of a welding condition for manufacturing an additively-manufactured object by welding a filler metal and depositing weld beads, the machine learning device includes: at least one hardware processor configured to perform a learning process for generating a learned model using two pieces of shape data of a weld bead or a difference between the two pieces of shape data is used as input data and a difference between welding conditions corresponding to the difference between the two pieces of shape data as output data.
Abstract: A flux-cored wire for arc welding, including a steel sheath filled with flux, where the wire contains, relative to a total mass of the wire, Cr: 16.0 to 22.0 mass %, Ni: 6.0 to 11.0 mass %, Mn: 0.7 to 2.6 mass %, Si: 0.1 to 1.1 mass %, Zr: 0.2 to 0.8 mass %, Fe: 45.0 to 65.0 mass %, TiO2: 5.0 to 9.0 mass %, SiO2: 0.1 to 2.0 mass %, ZrO2: 0.5 to 3.0 mass %, and Bi: less than 0.0020 mass %. Where by mass %, a Si content is denoted by [Si] and a Zr content is denoted by [Zr], a value of parameter A expressed by A=[Si]+2×[Zr] satisfies 1.4 to 2.5.
Abstract: A method for manufacturing an additively-manufactured object includes forming a plurality of weld beads obtained by melting and solidifying a filler metal sent out from a torch and depositing each weld bead. The method includes forming and depositing a first weld bead of the plurality of weld beads in a first welding control mode, and forming and depositing a second weld bead of the plurality of weld beads in a second welding control mode with a higher heat input than in the first welding control mode. The first welding control mode is a forward and reverse feeding control in which, while the filler metal is fed sequentially in a forward direction and a reverse direction, a current waveform of a power supplied to the filler metal from a power source is synchronized with the forward and reverse feeding of the filler metal.
Abstract: The shape and the position of a workpiece are measured without having to prepare three-dimensional CAD data in advance. A workpiece measurement method for measuring a shape and a position of a workpiece constituted of a plurality of components includes: an acquiring step for acquiring three-dimensional point, cloud data of the workpiece; an outline estimating step for estimating at least one boundary frame indicating an outline corresponding to each of the plurality of components by using the point cloud data and a condition defined in correspondence with the shape of the workpiece serving as a measurement target; and an optimizing step for optimizing the at least one boundary frame estimated in the outline estimating step by adjusting a parameter in accordance with an evaluation function, and identifying a shape of each of the plurality of components.
Abstract: An arc welding method includes welding a steel sheet while alternately switching feeding of a welding wire between forward feeding and backward feeding. The welding wire contains, in mass % with respect to a total mass to the welding wire, C: more than 0 and 0.30 or less, Si: 0.01 to 0.30, Mn: 0.5 to 2.5, S: 0.001 to 0.020, Ti: 0.05 to 0.30, and optional elements with the remainder being Fe and unavoidable impurities, and a value obtained by 2×[Ti]/[Si]?50×[S] is more than 1.0. The welding is performed by using a shielding gas containing CO2 gas in an amount of 80 vol. % or more with respect to a total volume of the shielding gas at a frequency of 40 Hz or more and 200 Hz or less, where one cycle for determining the frequency is one forward feeding and one backward feeding.
Abstract: A testing method for a joined body, in which a second pipe member having an outer diameter smaller than that of a first pipe member having at least one through hole is inserted into the first pipe member and the second pipe member is expanded to form a joining portion, the testing method includes: applying an elastic wave vibration to the joined body of the first pipe member and the second pipe member, for plural visual field regions at different positions in a circumferential direction of the joined body, acquiring a vibration distribution of the second pipe member measured through the through hole and a vibration distribution of the first pipe member in a visual field region including the joining portion of the first pipe member and the second pipe member, which are measured optically and in a batch, and determining quality of joining in the entire joining portion based on the acquired vibration distributions.