초록 ▼

Method for manufacturing elements made from composite material using the co-bonding technique, in which uncured elements (preformed beams (2)) are bonded onto another cured element (the skin (3)) with multiple thickness changes, using a rigid tooling made of invar used for support and positioning du

Method for manufacturing elements made from composite material using the co-bonding technique, in which uncured elements (preformed beams (2)) are bonded onto another cured element (the skin (3)) with multiple thickness changes, using a rigid tooling made of invar used for support and positioning during the curing process. Each element is made with preimpregnated material using automated tape laying. The preform of the beams (J-section) is obtained by hot forming of flat laminates. The final curing and bonding to the precured skin (co-bonding) is performed using a direct vacuum bag in an autoclave. A flat development of the vacuum bag is performed, it is traced with a numerical control machine and it is made prior to being placed on the tool. For large surfaces with difficult access the final adjustment is performed with the tool and the part in a vertical position, due to the ergonomic difficulties involved in working on certain areas of same. The invention is applicable to the field of aeronautics.

대표청구항 ▼

Method for manufacturing elements made from composite material using the co-bonding technique, in which uncured elements (preformed beams (2)) are bonded onto another cured element (the skin (3)) with multiple thickness changes, using a rigid tooling made of invar used for support and positioning du

Method for manufacturing elements made from composite material using the co-bonding technique, in which uncured elements (preformed beams (2)) are bonded onto another cured element (the skin (3)) with multiple thickness changes, using a rigid tooling made of invar used for support and positioning during the curing process. Each element is made with preimpregnated material using automated tape laying. The preform of the beams (J-section) is obtained by hot forming of flat laminates. The final curing and bonding to the precured skin (co-bonding) is performed using a direct vacuum bag in an autoclave. A flat development of the vacuum bag is performed, it is traced with a numerical control machine and it is made prior to being placed on the tool. For large surfaces with difficult access the final adjustment is performed with the tool and the part in a vertical position, due to the ergonomic difficulties involved in working on certain areas of same. The invention is applicable to the field of aeronautics. applied to the mandrel.5. An apparatus for installing a hollow threaded insert into a hole in a substrate having first and second surfaces where the insert has a hollow shaft having a first end portion, a second end portion and an intermediate portion between the first end portion and second end portion, the insert having a front flange surrounding the first end portion of the shaft for engaging the front surface of the substrate around the hole, the second end portion of the shaft having an internal thread and, said intermediate portion comprising a gripping means that engages the rear surface when a force is applied that pulls the second end portion toward the first end portion; said apparatus comprising: a piston; a single drive shaft; a cylinder; an externally threaded mandrel having threads that match the internal threads of the insert; a slide coupling; a rotatable drive; a non-rotatable nose retainer; means for moving the piston, drive shaft, cylinder, mandrel, slide coupling, rotatable drive and nose retainer toward the flange of the insert so that the threads of the mandrel contact the threads of the insert; means for moving the threads of the mandrel into the hollow portion of the insert through the flange so that the threads of the mandrel rotate into the threads within the hollow portion of the insert until the flange of the insert contacts the nose retainer, said means for moving and rotating comprising the drive shaft connected to the mandrel where the drive shaft is set into the slide coupling to couple it to the rotatable drive; means for moving the mandrel with attached insert to place the insert shaft into a hole in the substrate so that the flange of the insert contacts the first surface of the substrate; means for pulling the second end portion of the insert toward the second surface of the substrate by means of a pressure applied to the piston within the cylinder where the piston has a central bore retaining the drive shaft that passes through the bore so that the applied pressure moves the drive shaft in the slide coupling toward the drive so that the motion of the drive shaft and attached mandrel collapses the intermediate portion of the insert to grip the second surface of the substrate; means for turning the drive in a reverse direction to disengage the screw head from the threads in the insert; means for moving the piston, drive shaft, cylinder, mandrel, slide coupling, rotatable drive and nose retainer away from the flange of the installed insert; and means for controlling the means for moving the piston, the means for moving the threads of the mandrel, the means for moving the mandrel with attached insert, means for pulling and means for turning, comprising a programmed logic chip and data sensors. 6. The apparatus of claim 5 wherein the means for moving the piston, drive shaft, cylinder, mandrel, slide coupling, rotatable drive and nose retainer toward and away from the insert comprises a slide connecting the cylinder to a frame where the cylinder is in turn interconnected to the piston, drive shaft, mandrel, slide coupling, rotatable drive and nose retainer.7. The apparatus of claim 6 where the means for moving the piston, drive shaft, cylinder, mandrel, slide coupling, rotatable drive and nose retainer toward and away from the insert includes hydraulic cylinders connected between the frame and a bracket holding the cylinder where the bracket operates within the slide.8. The apparatus of claim 5 wherein the sensors include at least one sensor for detecting distance of movement of the mandrel.9. The apparatus of claim 5 wherein the sensors include at least one sensor for detecting pulling force applied to the mandrel.10. A method for installing a hollow threaded insert into a hole in a substrate having first and second surfaces where the insert has a hollow shaft having a first end portion, a second end portion and an intermediate portion between the first