Abstract: A workpiece processing method includes: a section roll forming step of subjecting a flat plate shaped workpiece to forming to impart a prescribed cross-sectional shape thereto; a solution heat treatment step of subjecting the workpiece, after the section roll forming step has been performed, to solution heat treatment; a contour roll forming step of subjecting the workpiece, after the solution heat treatment step has been performed, to forming to bend the workpiece into an arcuate shape; and a stretch forming step of subjecting the workpiece, after the contour roll forming step has been performed, to forming to impart a curved shape, following a curved surface of a die, to the workpiece by bringing the workpiece into contact with the curved surface and inputting a tension load to the workpiece.

Abstract: A stretch forming device includes a die and gripping portions gripping both end portions of an elongate material. The cross-sectional shape of the die has a curved shape bulging a central side of a forming surface; the length in a longitudinal direction of the elongate material is less than that of the forming surface; a second die having a second forming surface along the forming surface is installed removably on a central portion of the forming surface; and the stretch forming device has a first mode wherein, when the second die is installed on the forming surface, only the second die is pressed against the elongate material while a tensile force is applied to the elongate material, and a second mode wherein, when the second die is removed from the forming surface, the die is pressed against the elongate material while a tensile force is applied to the elongate material.

Abstract: A stacking apparatus for loading a recording medium output from an image forming apparatus includes a movable tray that is ejectable to an outside of the stacking apparatus after the recording medium output from the image forming apparatus is stacked on the movable tray, and a hardware processor that controls a position of the movable tray based on a current position of the movable tray and a setting condition for determining control content of the movable tray, wherein the hardware processor stores the movable tray inside the stacking apparatus, when the movable tray is currently positioned on the outside of the stacking apparatus and the setting condition satisfies a storage condition for executing storage control for moving the movable tray from the outside to an inside of the stacking apparatus so as to store the movable tray inside the stacking apparatus.

Abstract: A stacker includes: an ejector that ejects a sheet on which an image is formed depending on a print job to an ejection destination; a first tray on which the sheet ejected by the ejector is stacked, as the ejection destination; a second tray that is a delivery destination of the sheet stacked on the first tray and with which automatic external ejection processing that ejects the sheet externally is executable; a setter that accepts a setting detail in which it is set whether or not to execute the automatic external ejection processing executable with the second tray; and a controller that controls whether or not to execute the automatic external ejection processing depending on the setting detail, wherein the hardware processor continues stacking of the sheet on the first tray when not executing the automatic external ejection processing.

Abstract: A plate-shaped workpiece forming method of post-machining a pocket (3) on a curved inner surface of a plate-shaped workpiece (2) in a state where the plate-shaped workpiece (2) curved by a curving machine (10) is spread flat. The method includes a curving step (A) of setting a net curve radius (R0) obtained by adding a curve radius contraction amount (R1) due to spring-in to a finished curve radius (R) of a plate-shaped workpiece (2), taking into account an amount of contraction of the curve radius of the plate-shaped workpiece (2) between before and after machining of a pocket (3) due to spring-in, and curving the plate-shaped workpiece (2) so as to achieve the net curve radius (R0); and a pocket machining step of post-machining the pocket (3) by flatly spreading the curved plate-shaped workpiece (2).

Abstract: A plate-shaped workpiece forming method of post-machining a pocket (3) on a curved inner surface of a plate-shaped workpiece (2) in a state where the plate-shaped workpiece (2) curved by a curving machine (10) is spread flat. The method includes a curving step (A) of setting a net curve radius (R0) obtained by adding a curve radius contraction amount (R1) due to spring-in to a finished curve radius (R) of a plate-shaped workpiece (2), taking into account an amount of contraction of the curve radius of the plate-shaped workpiece (2) between before and after machining of a pocket (3) due to spring-in, and curving the plate-shaped workpiece (2) so as to achieve the net curve radius (R0); and a pocket machining step of post-machining the pocket (3) by flatly spreading the curved plate-shaped workpiece (2).