Abstract: A press-forming tool comprising: a punch including a punch portion and a plate portion transferring shape to a blank material; a die paired with the punch and opposes the punch portion; a wrinkle suppression mold including a first surface opposing the plate portion and comes into contact with the plate portion at a press-forming ending point, a second surface opposing the die and holds the blank material along with the die, and a third surface continued between the first and second surface and opposes the punch portion, and disposed between the third surface and the punch portion via a gap; a pressure receiving portion including a groove portion on the first surface of the wrinkle suppression mold; and a wrinkle suppression force increasing portion disposed on a surface opposing the first surface of the plate portion, protrudes toward the pressure receiving portion, and generates a reaction force opposed to a pressing direction when pressed in the pressing direction in end-phase of a press-forming.

Abstract: Provided is a plastic working method of steel including austenite, the method including: analyzing a strain ratio ?x of an estimated breaking point which is specified during plastic deformation of the steel; heating a steel such that a local temperature Tlocal is within a temperature range indicated by the following expression 1, when T?x represents a strain-induced-transformation-maximum-ductility-temperature in the unit of ° C. for the strain ratio ?x, ?L?x represents the standard deviation of a fitted curve of critical equivalent strain which depends on the strain ratio ?x on a lower temperature side than T?x, ?H?x represents the standard deviation of a fitted curve of critical equivalent strain which depends on the strain ratio ?x on a higher temperature side than T?x, and Tlocal represents a local temperature in the unit of ° C. of the estimated breaking point; and plastically deforming the steel after heating: T?x?2×?L?x?Tlocal?T?x+1.25×?H?x??(Expression 1).

Abstract: A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.

Abstract: According to exemplary embodiments of the present invention, using a fracture limit stress line obtained by converting a hole expansion ratio into a stress as a criterion for a fracture, the risk of fracture in a material can be evaluated quantitatively by comparing the relationship between data obtained from a numerical analysis using a finite element method and the fracture limit stress line. Thus, when determining a fracture limit in a stretch flange portion in a thin plate in a process including one or more deformation path variations, it is possible to obtain the fracture limit curve easily and efficiently and predict the fracture with high accuracy, and the risk of fracture upon press forming or crash can be evaluated.

Abstract: The present invention has its object to provide an efficient, general use shaping technique for forming high strength sheet metal into a three-dimensionally complicated shape. Further, the present invention provides a working apparatus for shaping sheet metal comprising a die (also called a “punch”) which has a shape suitable for a shape of shaped sheet metal, a plurality of rolls which grip sheet metal (H) with the die to shape the sheet metal, roll movement mechanisms which makes the rolls independently move in a horizontal direction and make them independently ascend or descend in a vertical direction, and a roll angle setting mechanism which can change an angle by which the rolls are pressed against the die.

Abstract: A load-applying device of a press-forming die includes a rod which includes a first end, a second end, and a flange, a lamination coned disc spring in which a plurality of coned disc springs having a center hole, to which the first end of the rod is inserted, are laminated, a first plate which includes a first through hole to which the first end of the rod is inserted and abuts the lamination coned disc spring, a second plate which includes a second through hole to which the second end of the rod is inserted and abuts the flange; and a gap fixing member which is detachably provided between the first plate and the second plate and fixes a gap between the first plate and the second plate so as to maintain the gap by which the lamination coned disc spring biases the flange to the second plate. The second end and the first plate relatively move in a mutually approaching direction during press-forming, and the lamination coned disc spring is compressed.

Abstract: When discretizing an analysis target part into plural elements and performing analysis, sheet thickness reduction rate or maximum principal strain at an equivalent position including a same element is compared by either a manner of combining two adjacent elements after the analysis or a manner of changing an element discretization size with two types and performing the analysis, and the element where the difference is large is extracted as a fracture risk portion. With this structure, a fracture risk portion can be extracted reliably when a fracture is predicted by a finite element method.

Abstract: The present invention has its object to provide an efficient, general use shaping technique for when forming high strength sheet metal into a three-dimensionally complicated shape. Further, the present invention provides a working apparatus for shaping sheet metal comprising a die (10) (also called a “punch”) which has a shape suitable for a shape of shaped sheet metal, a plurality of rolls (30 to 33) which grip sheet metal (H) with the die to shape the sheet metal, roll movement mechanisms (40) which makes the rolls independently move in a horizontal direction and make them independently ascend or descend in a vertical direction, and a roll angle setting mechanism which can change an angle by which the rolls are pressed against the die.

Abstract: An imaging apparatus is provided, which includes an image capturing unit, an adjusting unit and a display unit. The adjusting unit adjusts a clipped area for an image captured by the image capturing unit on photographing mode. The display unit displays a first number of pixels of the clipped area adjusted by the adjusting unit.

Abstract: When discretizing an analysis target part into plural elements and performing analysis, sheet thickness reduction rate or maximum principal strain at an equivalent position including a same element is compared by either a manner of combining two adjacent elements after the analysis or a manner of changing an element discretization size with two types and performing the analysis, and the element where the difference is large is extracted as a fracture risk portion. With this structure, a fracture risk portion can be extracted reliably when a fracture is predicted by a finite element method.

Abstract: A method of identification of a cause of occurrence of springback comprising a press forming analysis step of numerically analyzing forming conditions of press forming to obtain forming data of a press formed part, a processing step of processing at least one of a physical property value and physical property quantity data of part of the regions of said press formed part among forming data of said press formed part, and a springback value calculation step of calculating a springback value based on the results of said processing.

Abstract: According to exemplary embodiments of the present invention, using a fracture limit stress line obtained by converting a hole expansion ratio into a stress as a criterion for a fracture, the risk of fracture in a material can be evaluated quantitatively by comparing the relationship between data obtained from a numerical analysis using a finite element method and the fracture limit stress line. Thus, when determining a fracture limit in a stretch flange portion in a thin plate in a process including one or more deformation path variations, it is possible to obtain the fracture limit curve easily and efficiently and predict the fracture with high accuracy, and the risk of fracture upon press forming or crash can be evaluated.

Abstract: According to an embodiment, a method for accessing a cell includes: a first access step of taking out a cartridge from the cell or inserting the cartridge into the cell in an initial stop position; and a second access step of taking out the cartridge from the cell or inserting the cartridge into the cell in one or more positions in the vicinity of the initial stop position until the taking-out or insertion operation succeeds in a case where the first access step has failed.

Abstract: An imaging apparatus is provided, which includes an image capturing unit, an adjusting unit and a display unit. The adjusting unit adjusts a clipped area for an image captured by the image capturing unit on photographing mode. The display unit displays a first number of pixels of the clipped area adjusted by the adjusting unit.

Abstract: A device that records information on an optical disc and a method for recording the information on the optical disc, so as to maintain a constant recording quality when the information is recorded on the optical disc using a constant number of the rotations to control the speed. The recording device includes a linear velocity detector detects a linear velocity which is a velocity of a spot of a light, which is irradiated to record the information on a surface of the optical disc, in a tangential direction of a circumference of the optical disc, and an optical power controller controlling the optical power of the light to record the information on the surface of the optical disc based on the linear velocity detected by the linear velocity detector.

Abstract: A ferritic steel sheet wherein a mean value of X-ray random intensity ratios of a group of {100}<011> to {223}<110> orientations is 3.0 or more and a mean value of X-ray random intensity ratios of three crystal orientations of {554}<225>, {111}<112>, and {111}<110> is 3.5 or less and further at least one of the r values in a rolling direction and a direction at a right angle of that is 0.7 or less.

Abstract: According to an embodiment, a method for accessing a cell includes: a first access step of taking out a cartridge from the cell or inserting the cartridge into the cell in an initial stop position; and a second access step of taking out the cartridge from the cell or inserting the cartridge into the cell in one or more positions in the vicinity of the initial stop position until the taking-out or insertion operation succeeds in a case where the first access step has failed.

Abstract: An optical disc recording device controls a rotational rate of an optical disc and an optical disc recording device recording using a constant angular velocity method, thereby efficiently using the performance of the optical disc. A CPU reads management information (a maximum address value) for a farthest recording region, which is located at a circumference farthest from a center of the optical disc. A distance from the center of the optical disc to the farthest circumference of the recording region is calculated based on the read maximum address value. The rotational rate is calculated based on the calculated distance so that the recorded data rate of the farthest recording region is a maximum recorded data rate for the optical disc, and therefore is set to be used by a servo controller.

Abstract: A method for controlling the number of disk revolutions in a disk drive using a zone CLV control system to reduce or eliminate the possibility of read-out errors when the data read-out position is shifted from a current zone to a neighboring zone during a sequential data read-out operation. In accordance with the method, it is determined whether or not data to be read out is sequential data, when a zone change is made. Where sequential data is to be read out, the zone change is made under the condition in which the gain of a rotation control system for the disk motor is attenuated. Where the data to be read out is not sequential data, the gain of the disk motor rotation control system is increased. Under this condition, a seek operation is executed.

Abstract: The present invention provides a steel pipe excellent in formability during hydraulic forming and the like and a method to produce the same, and more specifically: a steel pipe excellent in formability having an r-value of 1.4 or larger in the axial direction of the steel pipe, and the property that the average of the ratios of the X-ray intensity in the orientation component group of {110}<110> to {332}<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 3.5 or larger, and/or the ratio of the X-ray intensity in the orientation component of {110}<110> on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 5.