This invention relates to an apparatus for forming a helical screw flight from a flight blank. The apparatus includes a base and an engaging means. The engaging means is movably mounted to the base and is configured to formingly engage the blank so as to form a twist in at least a portion of the flight blank corresponding to a predetermined pitch of the flight.

This invention relates to an apparatus for forming a helical screw flight from a flight blank. The apparatus includes a base and an engaging means. The engaging means is movably mounted to the base and is configured to formingly engage the blank so as to form a twist in at least a portion of the flight blank corresponding to a predetermined pitch of the flight.

A method and apparatus manufactures a closed structure part without flange having a curvature and welded edges along a longitudinal direction of the part and further having a varying cross-sectional shape, from two metal plates. Each of two metal plates provided with a curvature along the longitudinal direction of the plate and provided with both ends in a width direction of the plate, are press-formed such that a folding line is formed at positions corresponding to a non-welded bent edge in a cross section of the part, and stacked on each other vertically such that their bulging sides face outward. Their left ends and right ends in the width direction are mutually welded along the longitudinal direction to form welded edges.

A shaping tool die for shaping components from sheet material includes two matching shaping tool die halves, each shaping tool die half having a plurality of spaced plate die shapes, each die shape having a rotatable curved surface mated with a curved recess in the free end of a base mounting plate such that each plate die shape is separately adjustable relative to a mated mounting plate. A position fixing plate is associated with each plate die shape and base mounting plate combination to adjustably fix the position of the plate die shape relative to the base mounting plate in a desired position. A base member is provided for receiving the base mounting plates for each tool die half, and at least one clamp plate member threaded through corresponding base mounting plates of each die half and removably fixed to a corresponding base member is provided to fix the base mounting plates in place.

A shaping tool die for shaping components from sheet material includes two matching shaping tool die halves, each shaping tool die half having a plurality of spaced plate die shapes, each die shape having a rotatable curved surface mated with a curved recess in the free end of a base mounting plate such that each plate die shape is separately adjustable relative to a mated mounting plate. A position fixing plate is associated with each plate die shape and base mounting plate combination to adjustably fix the position of the plate die shape relative to the base mounting plate in a desired position. A base member is provided for receiving the base mounting plates for each tool die half, and at least one clamp plate member threaded through corresponding base mounting plates of each die half and removably fixed to a corresponding base member is provided to fix the base mounting plates in place.

This invention relates to an apparatus for forming a helical screw flight from a flight blank. The apparatus includes a base and an engaging means. The engaging means is movably mounted to the base and is configured to formingly engage the blank so as to form a twist in at least a portion of the flight blank corresponding to a predetermined pitch of the flight.

This invention relates to an apparatus for forming a helical screw flight from a flight blank. The apparatus includes a base and an engaging means. The engaging means is movably mounted to the base and is configured to formingly engage the blank so as to form a twist in at least a portion of the flight blank corresponding to a predetermined pitch of the flight.

A method of manufacturing a press-formed part curved in top view and including at least a top portion and a side wall portion continuous from the top portion, the method includes: a forming step of performing press forming by using a forming mold having a first estimated angle, which leaves twist (reverse twist) caused by springback in a direction opposite to twist (forward twist) generated by springback in a case where press forming is performed in one step without giving an estimated angle to a mold; and a restrike step of press-forming a formed part formed in the forming step by using a restrike mold having a second estimated angle.

A method of manufacturing a press-formed part curved in top view and including at least a top portion and a side wall portion continuous from the top portion, the method includes: a forming step of performing press forming by using a forming mold having a first estimated angle, which leaves twist (reverse twist) caused by springback in a direction opposite to twist (forward twist) generated by springback in a case where press forming is performed in one step without giving an estimated angle to a mold; and a restrike step of press-forming a formed part formed in the forming step by using a restrike mold having a second estimated angle.