METHOD FOR MANUFACTURING A THREE DIMENSIONAL FRAME STRUCTURE FOR USE AS A CORE STRUCTURE IN A SANDWICH CONSTRUCTION AND FRAME STRUCTURE MANUFACTURED THEREBY

• Main Authors: ENDRES, GREGOR CHRISTIAN, WEBER, HANS-JUERGEN
• Format: Patent
• Language: English; French
• Published: 28.05.2013
• Subjects: BUILDING; BUILDING MATERIALS; FIXED CONSTRUCTIONS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; STRUCTURAL ELEMENTS; TRANSPORTING; WORKING OR PROCESSING OF METAL WIRE; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The present invention relates to a method for manufacturing a three dimensional frame structure that can be used as a core structure in a sandwich construction. Furthermore, the invention relates to a frame structure for a sandwich construction, which frame structure has been manufactured in accordance with the method according to the invention. In the method, a two dimensional lattice structure (1) is made from bar-shaped linear semifinished products (2, 3), in which structure (1) the semifinished products (2, 3) intersect at defined points of intersection (4); the bar- shaped linear semifinished products (2, 3) are connected at the points of intersection (4) and are softened by locally applying heat to the lattice structure (1) in each case along three non-intersecting (imaginary) straight lines (5, 6). In order to impart a three dimensional shape to the lattice structure (1) a force (F) is introduced into the lattice structure (1) along the middle one of the (imaginary) straight lines (5, 6) to which heat has been applied, wherein, as a result of deformation of the lattice structure, the introduced force F is deflected into pairs of tensile forces acting in the semifinished products, as a result of which the lattice structure (1) is pulled into a third dimension, along the middle (imaginary) straight line (5, 6) to which heat has been applied.