An apparatus that manufactures a closed-structure part includes a bottom portion and left and right side wall portions, including a press-forming die that form a plurality of first out-of-plane deformed portions and bent portions, the first out-of-plane deformed portions being formed in a region of a workpiece corresponding to the bottom portion and arranged along a longitudinal direction, each of the first out-of-plane deformed portions having a recessed shape or a protruding shape; a pad and a punch that squash the first out-of-plane deformed portions by clamping the region of the workpiece corresponding to the bottom portion therebetween, a cross-sectional shape of a pressing portion of the punch being curved along the longitudinal direction; and bending dies that bend the bent portions by pressing the punch into a space therebetween while the region of the workpiece corresponding to the bottom portion is clamped between the pad and the punch.

A method of forming a closed cross-sectional structure press-forming the plate-shaped workpiece into portions corresponding to bottom portion and left and right side wall portions; and providing bend-facilitating lines at the plurality of bend lines; bending the workpiece in a direction that the portions corresponding to the left and right side wall portions approach each other by pressing a punch into a space between a pair of dies while clamping the portion corresponding to the bottom portion between the punch and a pad in a plate thickness direction; and bending the corresponding portions along the bend-facilitating lines by pressing the corresponding portions against an outer periphery of a plug having an outer peripheral shape the same as a final shape of the closed cross-sectional structure while the plug is placed on the portion of the workpiece corresponding to the bottom portion.

A method manufactures a closed-structure part by forming a flat plate-shaped workpiece into a closed structure including a bottom portion curved along a longitudinal direction. The method includes a first forming step of forming a plurality of first out-of-plane deformed portions and a bent portion, the first out-of-plane deformed portions being formed in a region of the workpiece corresponding to the bottom portion and arranged along the longitudinal direction, each of the out-of-plane deformed portions having a recessed shape or a protruding shape; and a second forming step of squashing the first out-of-plane deformed portions between a pad and a punch such that the region of the workpiece corresponding to the bottom portion is curved and bending bent portions by pressing the punch into a space between dies while the region of the workpiece corresponding to the bottom portion is clamped between the pad and the punch.

The invention relates to a device and method for producing at least partially closed profiles from metal sheet, having a first tool part, a second tool part, and at least one supporting core. The insertion movement of the supporting core between the bending jaws is limited by a stop and, in its insertion position limited by the stop, protrudes with respect to the bending jaws in the direction of the die, in that the supporting core is arranged on a carrier that is movable relative to the die, and in that the bending jaws are assigned at least one displacement element connected rigidly thereto, the displacement element coming into contact with the carrier when the bent metal sheet portion engages around the supporting core.

The present invention seeks to enable a band-shaped metal wire member to be stably accommodated within a die. A die is prepared that includes a bottom die provided with a depression and a top die provided with a projection that can be arranged within the depression so as to close off a space above the depression. An inner surface of the depression includes a central die surface formed at a width-direction center of a base of the depression and a pair of curved guide die surfaces provided continuous with two sides of the central die surface and curved so as to project outward. The central die surface is formed as a flat surface or as a surface that curves more gently than the pair of curved guide die surfaces. A bonding process portion of a band-shaped metal wire member is folded in two and arranged within the depression.

The disclosure relates to a tubular component for a chassis of a vehicle, wherein the tubular component may include an extruded profile made of an aluminum alloy. The extruded profile may include a rounded extruded profile base and profile walls extending from the rounded extruded profile base and facing one another, wherein the profile walls are curved towards one another to form the tubular component.

A forming tool and a method of operating thereof for producing a hollow component by sheet-metal forming is disclosed having an upper tool and a lower tool, a mandrel that is driven into the hollow component to be formed and an auxiliary mandrel that is repositionable relative to the mandrel are positioned on the upper tool. The mandrel and the auxiliary mandrel are coupled to the upper tool by one spring-elastic actuation element in such a manner that the mandrel, when the upper tool is being lowered, is driven into the hollow component to be formed and comes to bear therein. A further lowering of the upper tool causes a compression of the coupling element, and the auxiliary mandrel carrying out a movement relative to the mandrel and being driven further into the hollow component.

A method includes: bending a sheet about a mandrel such that the sheet is tubular, wherein the sheet includes a first longitudinal end portion and a second longitudinal end portion; engaging the first longitudinal end portion with the second longitudinal end portion; and passing the sheet between a first knurling wheel and a second knurling wheel such that the first knurling wheel applies a first knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion and the second knurling wheel applies a second knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion.

A method for producing open-seam pipes from sheet metal panels, in particular thick sheet metal panels. A sheet metal panel, having bending edges on the long sides thereof, is fed to a pipe forming press, in which the sheet metal panel is formed, lying on a lower tool having of two supporting elements which are horizontally spaced apart from each other, by an upper tool, which can be raised and lowered, by application of a bending force, progressively into an open-seam pipe having bending edges on opposite long sides with a gap for later longitudinal seam welding. In order that the sheet metal panel can be easily, progressively formed or shaped from the start, at least the bending sections immediately adjacent on the bending edges of the sheet metal panel are each formed from the outside to the inside, deviating from a numerically ascending bending step sequence in the pilgering process.

An apparatus for manufacturing a bracket-integrated double-layer door impact beam is provided. The apparatus includes a lower mold having a lower cavity formed with a base material molded to have a U-shaped cross section and a predetermined length. The base material is seated on the lower cavity. A lower electrode terminal is disposed in the lower mold to contact the base material. An upper mold has an upper cavity therein and is coupled with the lower mold to pressurize both end portions of the U-shaped cross section of the base material inward to form the base material with an O-shaped cross section. An upper electrode terminal is disposed in the upper mold to contact the base material.