Method for producing a jig for tubes having bent sections, and resulting jig

A manufacturing process of a jig for thermal forming and/or inspection of a tube with a neutral axis (x) comprising n bent sections connected by straight sections, comprising the steps of:

• producing n individual jigs:
• each of the n individual jigs is dedicated to a tube segment made up of one of the n bent sections of the tube and a predetermined length, in part or in full, of each of the straight sections extending in a continuation of one of the n bent sections, so that each tube segment includes a planar neutral axis (x) that extends into a plane corresponding to a bending plane of the bent section of the tube segment,
• each of the n individual jigs comprising:
• guiding components delimiting an open guiding duct section with a planar neutral axis (x′) extending into a plane, with the guiding duct section includes a longitudinal profile of the tube segment and a section adapted to house the tube segment, wherein the guiding components are made up of pinpoint guiding components having a groove with a section coupled to the tube forming a duct made up of a succession of pinpoint supports of the tube,
• a base having at least a longitudinal flat bottom base plate, in which multiple ports are aligned along a longitudinal line parallel to the planar neutral axes (x′), and
• planar guiding components adapted for insertion in the multiple ports of the bottom base plate of each base, provided so that the grooves of the guiding components are oriented towards the neutral axis (x′), the guiding components comprise a median portion with dimensions adapted to form a spacer that defines a distance separating two base plates of the base,
• juxtaposing the n individual jigs with the guiding duct sections of the n individual jigs in a continuation of each other to orient the n individual jigs so as to obtain a relative orientation between the planes defined by the neutral axes (x′) of the guiding duct sections identical to a relative orientation among the bending planes defined by the n bent sections of the tube, and
• coupling the n individual jigs among each other.