An apparatus (1) for deforming a metal bar (2) having a rectangular section up to obtaining a metal bar (2) having a trapezoidal section or a hexagonal section, the metal bar (2) having a rectangular section comprising a first lateral wall (3) and a second lateral wall (4) which are opposite one another, and a third lateral wall (5), the apparatus comprising: a first rotatable roller (11) which has a first conical wall (12); a second rotatable roller (13) which has a second conical wall (14); the first roller (11) and the second roller (13) being arranged with respect to one another such that: the first conical wall (12) and the second conical wall (14) are facing one another; and when the metal bar (2) having a rectangular section crosses a spatial region comprised between the first conical wall (12) and the second conical wall (14) with the relative third lateral wall (5) facing externally, they can press respectively against the first lateral wall (3) and the second lateral wall (4), deforming the metal bar (2) until it takes on a trapezoidal or hexagonal shape; guide means for deformation (15) which are arranged with respect to the first roller (11) and the second roller (13) such as to abut the third lateral wall (5) of the metal bar (2) and for guiding the deformation of the metal bar (2) in such a way that the metal bar (2) maintains a straight development, the guide means for deformation (15) being mobile in a distancing-nearing direction with respect to the first roller (11) and the second roller (13).

An apparatus (1) for deforming a metal bar (2) having a rectangular section up to obtaining a metal bar (2) having a trapezoidal section or a hexagonal section, the metal bar (2) having a rectangular section comprising a first lateral wall (3) and a second lateral wall (4) which are opposite one another, and a third lateral wall (5), the apparatus comprising: a first rotatable roller (11) which has a first conical wall (12); a second rotatable roller (13) which has a second conical wall (14); the first roller (11) and the second roller (13) being arranged with respect to one another such that: the first conical wall (12) and the second conical wall (14) are facing one another; and when the metal bar (2) having a rectangular section crosses a spatial region comprised between the first conical wall (12) and the second conical wall (14) with the relative third lateral wall (5) facing externally, they can press respectively against the first lateral wall (3) and the second lateral wall (4), deforming the metal bar (2) until it takes on a trapezoidal or hexagonal shape; guide means for deformation (15) which are arranged with respect to the first roller (11) and the second roller (13) such as to abut the third lateral wall (5) of the metal bar (2) and for guiding the deformation of the metal bar (2) in such a way that the metal bar (2) maintains a straight development, the guide means for deformation (15) being mobile in a distancing-nearing direction with respect to the first roller (11) and the second roller (13).

This production method produces a stator that includes a plurality of segment coils that are annularly arranged in a plurality of layers that overlap in the radial direction of a stator core. The production method involves a tool that has teeth being moved by a robot manipulator and the teeth being inserted between the ends of leg parts of the layers. The ends that engage the teeth are thereby bent so as to be substantially crank-shaped. Before the teeth are inserted between the ends, a restraining jig is inserted between bend parts of the segment coils of the layers and an end surface of the stator core that is on one side in the axial direction.

This production method produces a stator that includes a plurality of segment coils that are annularly arranged in a plurality of layers that overlap in the radial direction of a stator core. The production method involves a tool that has teeth being moved by a robot manipulator and the teeth being inserted between the ends of leg parts of the layers. The ends that engage the teeth are thereby bent so as to be substantially crank-shaped. Before the teeth are inserted between the ends, a restraining jig is inserted between bend parts of the segment coils of the layers and an end surface of the stator core that is on one side in the axial direction.

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 manufacture for a reinforced pipe (10), including the steps of, providing a first metal plate (1), having a thickness t; bending the first metal plate (1) along a bending line to form a helix (30), wherein the pitch of the helix (30) is substantially equal to the width of the plate; and wherein two consecutive turns of the helix (30) are in contact at a seam (20); welding the helix along the seam (20) forming a pipe; and welding at least a first metal stiffening element (2) to the pipe, forming a reinforced pipe (10).

A method of manufacture for a reinforced pipe (10), including the steps of, providing a first metal plate (1), having a thickness t; bending the first metal plate (1) along a bending line to form a helix (30), wherein the pitch of the helix (30) is substantially equal to the width of the plate; and wherein two consecutive turns of the helix (30) are in contact at a seam (20); welding the helix along the seam (20) forming a pipe; and welding at least a first metal stiffening element (2) to the pipe, forming a reinforced pipe (10).