An elastic double-support variable-diameter mandrel for bending of an aircraft engine-specific metal conduit includes a frame receiving pipe, an elastic outer frame and an inner hydraulic component. In the inner hydraulic component, an inner chamber of an elastic membrane is filled with a liquid, a tail end of the elastic membrane is provided with an opening, the opening communicates with a first end of a liquid delivery pipe through a pipe joint, and a second end of the liquid delivery pipe is connected to an external hydraulic system. The elastic outer frame is a flexible single unit composed of a tie rod and an elastic mesh structure. The tie rod includes an elastic traction segment, a straight segment and a pull ring. The elastic mesh structure includes wavy metal strip circumferences and anti-fatigue elastic connectors. The frame receiving pipe is sleeved outside the elastic outer frame/inner hydraulic component.

An elastic double-support variable-diameter mandrel for bending of an aircraft engine-specific metal conduit includes a frame receiving pipe, an elastic outer frame and an inner hydraulic component. In the inner hydraulic component, an inner chamber of an elastic membrane is filled with a liquid, a tail end of the elastic membrane is provided with an opening, the opening communicates with a first end of a liquid delivery pipe through a pipe joint, and a second end of the liquid delivery pipe is connected to an external hydraulic system. The elastic outer frame is a flexible single unit composed of a tie rod and an elastic mesh structure. The tie rod includes an elastic traction segment, a straight segment and a pull ring. The elastic mesh structure includes wavy metal strip circumferences and anti-fatigue elastic connectors. The frame receiving pipe is sleeved outside the elastic outer frame/inner hydraulic component.

A bending and molding mechanism includes two bases, wherein the bases are provided with a transverse sliding rail, two transverse sliding bases are disposed on the transverse sliding rail in a sliding manner, the base is provided with a transverse driving device driving the transverse sliding bases, the base is provided with a central clamping device, the transverse sliding bases are provided with a longitudinal sliding rail, the longitudinal sliding rail is provided with a longitudinal sliding base, the transverse sliding bases are provided with a longitudinal driving device driving the longitudinal sliding base to slide, the longitudinal sliding base is provided with a bending and molding device, one side of the transverse sliding base at the left side is provided with a left clamping device, and one side of the transverse sliding base at the right side is provided with a right clamping device.

A bending and molding mechanism includes two bases, wherein the bases are provided with a transverse sliding rail, two transverse sliding bases are disposed on the transverse sliding rail in a sliding manner, the base is provided with a transverse driving device driving the transverse sliding bases, the base is provided with a central clamping device, the transverse sliding bases are provided with a longitudinal sliding rail, the longitudinal sliding rail is provided with a longitudinal sliding base, the transverse sliding bases are provided with a longitudinal driving device driving the longitudinal sliding base to slide, the longitudinal sliding base is provided with a bending and molding device, one side of the transverse sliding base at the left side is provided with a left clamping device, and one side of the transverse sliding base at the right side is provided with a right clamping device.

A method for the individualized adaptation of the shape of components includes providing a basic material for producing the components. Next at least one unifying production method is selected. The components are then produced with a geometrically identical base shape by the unifying production method. Then at least one individualizing production method is selected. Then the shape of the components is adapted to at least two different final shapes by the individualizing production method that is different from the unifying production method. The final shape of each component differs from its basic shape.

A method for the individualized adaptation of the shape of components includes providing a basic material for producing the components. Next at least one unifying production method is selected. The components are then produced with a geometrically identical base shape by the unifying production method. Then at least one individualizing production method is selected. Then the shape of the components is adapted to at least two different final shapes by the individualizing production method that is different from the unifying production method. The final shape of each component differs from its basic shape.

The invention relates to a device for bending pipes, in particular coated pipes, in a preferred manner insulated pipes and/or pipes that are coated with PU foam/PUR rigid foam, for pipelines, said device having a basic body which can be positioned in the pipe and on which a running gear unit is provided for movement in the pipe and having at least three contact elements for producing a contact with an inside wall of the pipe for introducing a bending force, wherein at least two contact elements are provided on one side of the basic body on the ends of the basic body, and at least one contact element is arranged on the opposite side of the basic body, and wherein at least one of the contact elements is provided so as to be movable in relation to the basic body in the direction of the inside wall of the pipe by means of a force-introducing element. In addition the invention relates to a method for bending such pipes.

A method for determining elastomer types as pipe filler for pressure bending of a pipe, comprising: selecting a set of elastomer types; obtaining sample pieces from the elastomer types; applying strain test on the sample pieces; determining properties of the sample pieces; calculating strain energy and error function for each sample piece based on an energy model; calculating elastic modulus for each sample piece; selecting elastomer types from the set of elastomer types; analyzing results from the calculation of strain energy, error function and the elastic modulus for the selected elastomer types; simulating the pressure bending process of the pipe, using pipe filler made from the selected elastomer types; and when simulation results indicate an acceptable pressure bent pipe due to the simulated pressure bending, selecting the one or more elastomer types associated with the acceptable pressure bent pipe for the pipe filler.

A method for determining elastomer types as pipe filler for pressure bending of a pipe, comprising: selecting a set of elastomer types; obtaining sample pieces from the elastomer types; applying strain test on the sample pieces; determining properties of the sample pieces; calculating strain energy and error function for each sample piece based on an energy model; calculating elastic modulus for each sample piece; selecting elastomer types from the set of elastomer types; analyzing results from the calculation of strain energy, error function and the elastic modulus for the selected elastomer types; simulating the pressure bending process of the pipe, using pipe filler made from the selected elastomer types; and when simulation results indicate an acceptable pressure bent pipe due to the simulated pressure bending, selecting the one or more elastomer types associated with the acceptable pressure bent pipe for the pipe filler.

A method for bending a thin-walled tube to form a small radius bend on the thin-walled tube includes providing a die, lubricating the thin-walled tube, extruding the thin-walled tube, and thrusting elastomer fillers. A die defining a curved cavity enclosed within is provided. The curved cavity is configured to receive the thin walled tube. The thin-walled tube is lubricated using an antifriction coating material applied on an exterior surface of the thin-walled tube for reducing friction between the exterior surface of the thin-walled tube and the curved cavity of the die. The thin-walled tube is extruded into a curved section from an insertion end of the die. The elastomer fillers are thrusted into an inner surface of the thin walled tube via a mandrel. The mandrel is forced against the thin-walled tube to prevent damage of the inner surface of the thin-walled tube to form the small radius bend.