US 2020/0398499 A1 · ASSEMBLY OF PARTS MADE FROM THERMOPLASTIC MATERIAL AND METHOD FOR ASSEMBLING SUCH PARTS BY MEANS OF THERMOPLASTIC RIVETING

Abstract

This invention relates to an assembly of regions (10a, 10b) of composite parts (2a, 2b) with thermoplastic matrix, including a plurality of riveting points along regions (10a, 10) of the parts that overlap through the superposition of two faces (12a, 12b) of these regions (10a, 10b) which are positioned facing one another, each region (10a, 10b) having another, opposite, face (11a, 11b) which remains visible with the part (2a, 2b). The riveting is performed using assembly ties (6) made of thermoplastic resin-based composite material compatible with the material of the parts (2a, 2b). These ties (6), which are made up at least in part of a stitch of backstitch produced using a filament of a material selected from a fiber coated with aramid resin, a carbon fiber and a glass fiber, are embedded in said regions (10a, 10b) and passing right through the same with an orientation comprised between 30° and 90° with respect to their faces (11a, 11b; 12a, 12b).

Claims14

Dependent claims

An assembly of composite parts with thermoplastic matrix, comprising a plurality of riveting points performed by stitching assembly ties made up of material compatible with the material of the parts, these ties being embedded in said regions and pass right through the same points along regions (10a, 10b) of the parts that overlap through the superposition of two faces of these regions which are positioned facing one another, each region having another, opposite, face which remains visible with the part wherein the assembly ties are made of thermoplastic resin-based composite material, and in that the ties are made up at least in part of a stitch of backstitch produced using a filament of a fiber coated with aramid resin.

An assembly method for composite parts with thermoplastic matrix, using thermoplastic riveting, the method comprising the following steps:

overlapping the parts by superposing two faces of regions facing one another, each part having another, opposite, face which remains visible with the part;
bringing a holed heating panel into position on each face of visible region in such a way that the holes are positioned facing one another;
using transversely holed heating panels to heat the regions of the parts, from their opposite faces, to a temperature below the melting point of the thermoplastic-matrix material of the parts in order to begin to melt the regions of the superposed faces;
inserting at least one holing spike through a first heating panel, with successive holing of the first and of the second part so as to create at least one cylindrical bore;
withdrawing the holing spike, it being possible for this withdrawal to be performed by continuous movement in the same direction (“forward”) or in the opposite direction (“in reverse”);
inserting an assembly tie made of thermoplastic resin-based composite material into each cylindrical bore as far as the visible face of the second part, this tie being made up at least in part of a stitch formed of backstitch produced using a filament of fiber coated with aramid resin;
withdrawing the holed heating panels and in their place installing consolidation tooling that works by heating under pressure, to melt the material of which the assembly tie is made with that of the parts, followed by cooling.

4 more elements

Dependencies are inferred from the claim text.

Assembly of parts made from thermoplastic material and method for assembling such parts by means of thermoplastic riveting

Life of this patent

Assembly of parts made from thermoplastic material and method for assembling such parts by means of thermoplastic riveting

Life of this patent

Abstract

Claims14