摘要:
A weaving device for the production of thick textile armatures constituted by superposed layers of threads secured together by a binding thread traversing the layers, includes a frame provided laterally and at its periphery with regularly distributed hooking pins, elements for depositing with the aid of the pins, thread and elements for flattening the layers. The pins have a first section with a slight inclination outwardly of the frame and a second straight section prolonging the first and having an a substantially greater inclination outwardly of the frame. The elements for depositing thread include a plurality of guides each supplying a thread, and are moved simultaneously and spaced at an interval equal to n times the interval between pins. The elements for weaving the layers include elements adapted to press the assembly of the layers about their periphery.
摘要:
A three-dimensional weave is formed having a triple set of rods and yarns. The network of rods is placed about the generatrices of the body of revolution to be made and ordered regularly around the axis of the latter in coaxial layers of revolution and in successive radial bunches. Circumferential yarns and radial yarns are laid in helical courses and woven into said network of rods around the axis.
摘要:
The invention relates to woven hollow structures.Its object is to provide a method and a machine making it possible to obtain hollow reinforcements of revolution by three-dimensional weaving using rods 11, circumferential yarns 12 and radial yarns 13. In the network of rods 11 made to rotate around the axis 16 are introduced and woven the yarns 12 and 13, the latter being knitted by a needle 28 in the form of a chain stitch, and the helical layers of yarns thus formed, resting on a plate 20 to which is imparted a progressive downward movement, slide along the rods 11 and are tamped by fingers 30 over which is mounted a pressure plate 38.Application to the fabrication of woven reinforcements of complex shape for hollow bodies of revolution in plastic material.
摘要:
A reinforcement insert includes superposed laps of fiber which are coupled to each other by a coupling fiber which passes through the laps in order to form fiber sections wherein at least certain sections thereof are rectilinear. The fiber sections and laps are immersed in a cured resin. The total density of the fibers that make up the insert ranges from 50% to 60% of the volume of the insert and the fiber sections take up 3%-10% of the volume of the insert. A method for creating a sandwich structure includes at least one such insert.
摘要:
A machine for producing a reinforcement for a composite component. The machine includes a stand with a subframe having uprights with slideways for mounting a transverse bar on which is mounted a movable carriage. The carriage has a first movable arm extending in another direction and includes a second movable arm. The carriage is movable in a first direction, X, the first arm is movable in a second direction, Y, orthogonal to the first, and the second arm is movable transversely with respect to the plane defined by the bar and first arm in a third, Z, direction. Motors are provided to producing such movements. The second arm includes a thread-stitching tool which also constitutes a tool for laying down the thread and is mounted on a rotary support at the lower end of which is arranged the needle.
摘要:
Method for producing a fibrous reinforcement (1) for a component of composite material comprising at least two non-coplanar walls, which are for example orthogonal.According to the invention, at least one first fibrous element (2) is produced as a fiber mat, said first fibrous element (2) is applied via one of its narrow sides (4) against a first face (5) of a second element; and there are inserted, through a second face (7) of said second element (3), on the opposite side to said first face (5), and by the stitching without knotting of a continuous filament (F) by means of a needle, transverse fibers passing through said second element (3).Production of fiber-matrix composite components.
摘要:
The present invention relates to a connecting rod made of composite material, especially for internal-combustion engines, the composite material being formed by a reinforcement embedded in a cured material, and the connecting rod (A) comprising, along the longitudinal extension (X—X) of the connecting rod, a central shank (B) extended respectively, at its two ends, by a connecting-rod big end (C) and a connecting-rod small end (D). According to the invention, the connecting rod (A) is produced entirely as a single component made of composite material and the reinforcement of the composite material comprises superposed plies of crossed straight filling yarns, the filling yarns, which extend parallel to the longitudinal extension (X—X) of the connecting rod (A), constituting at least twice the volume percentage of the filling yarns which extend in each of the directions other than the longitudinal extension (X—X) of the connecting rod (A), and binding yarns pass through the superposed plies.
摘要:
The present invention relates to the production of a reinforcement for a composite component, comprising a fibrous substrate (22, 23) reinforced by a stitching thread forming stitches (27.1, 27.2; 30.1, 30.2; 33.1, 33.2 and 36.1, 36.2) passing through said substrate. According to the invention, said stitches are oblique and pass through said substrate slantwise, making an angle of inclination of at most 30.degree.. It is advantageous for said fibrous substrate to consist of plies of crossed threads (22, 23) defining mesh cells (24) through which said stitches pass.
摘要:
The present invention relates to a method and to a system for producing a reinforcement for a composite component, formed by said reinforcement embedded in a cured matrix, said reinforcement comprising superposed plies of thread. According to the invention, the system comprises means (5) for the memory storage and processing of data, in which means the mathematical model of the reinforcement (A) to be produced may be created and stored in memory and which are capable of controlling means (3) for steering the tool (1) for laying down and/or stitching thread (F).
摘要:
A reinforcement insert includes superposed laps of fiber which are coupled to each other by a coupling fiber which passes through the laps in order to form fiber sections wherein at least certain sections thereof are rectilinear. The fiber sections and laps are immersed in a cured resin. The total density of the fibers that make up the insert ranges from 50% to 60% of the volume of the insert and the fiber sections take up 3%-10% of the volume of the insert. A method for creating a sandwich structure includes at least one such insert.