SU927928A1 - Linear construction element - Google Patents

Description

(54) LINEAR CONSTRUCTION ELEMENT

I

The invention relates to trojet g-. 1st, in particular, to lengthy spatial structures.

A spatial construction element is known that is made of sheet stock with bends, slots and cutouts Cl.

The disadvantages of this design are the difficulty of manufacturing its workpiece due to the many sizes of cut-throughs and limbing and the increase in material consumption due to the large number of joints during cutting.

Closest to the present invention is a linear construction element of a multifaceted cross section, including cus, combined by a spatial grid made of sheet blank 2}.

The disadvantage of this solution is the low-tech design due to the complexity of the assembly, a large number of complicated cuts, a large amount of waste during cutting.

The purpose of the invention is to increase the manufacturability and reduce material consumption.

The goal is achieved by the fact that

The construction element of a multifaceted cross section, including the assembly, combined with a spatial grid made of sheet billet, was last cut with parallel longitudinal edges and successively bent in opposite directions along lines mutually intersecting at an angle, with the corner zones of the bore of the workpiece aligned with yourself.

FIG. 1 is shown schematically

15 triangular rod with a spatial sheet lattice, general view; in fig. 2 - lattice, general view; in fig. 3 - triangular rod with spatial perforated sheet of the sieve,

Claims (2)

20 general view; in fig. 4 - sheet blank for the grid; in fig. 5 - sheet stock for perforated grille with bends; in fig. 6 - tetrahedral rod with a spatial sheet re brush, general view; in fig. 7 - double spatial leaf lattice, .. general view; FIG. 8 is a tetrahedral rod with double spatial sheet lattice, general view. The linear building element includes cus 1, joined by a spatial grid 2. The latter is made of sheet blank 3 with parallel longitudinal edges 4. The spatial grid is formed by successive bends of sheet billet 3 in opposite directions along lines 5 intersecting at an angle Jf , providing a combination of the nodal zones of bending of the workpiece with themselves 1, with the formation of a plate 6 of the grid. The magnitude of the angle dg between the bend lines determines the free length of the branch of the linear element and its structural form. At 6 ° J ° 9 °, only a triangular element is formed. The condition 9О Т 12О ° corresponds to the trihedral and tetrahedral elements. 5, 6, ..., n -graded elements can be formed when the angle is increased to 18О. The triangular element (Fig. 1) consists of three pockets 1, made by rib angles with an opening angle of BS and spatial grid 2. The lattice is made of a billet sequentially bent in different directions. To facilitate the lattice, perforation of the sheet 7 is possible with the formation of a building element with a spatial perforated lattice (Fig. 3). The bending of the sheet blank (Fig. 4) is carried out along the lines of the bend 5 intersecting on the long keepers of the blank sheet. The angle between the bending lines determines the distance between the lattice nodes (c (is the length of the branch). For a three-branch rod, the angle f must be greater than B (with 3 b, c (O). Two planes adjacent to the bend line form the dihedral angle. Its value depends on the angle J and must be chosen so that the bend lines lie in the planes of the three faces of the building element. In order to increase local stability, you can bend limbs on the free edges of the sheet blank. In this case (Fig. 5) gib lines 5 intersect on lines 8 limbs. tetrahedral The linear building element (Fig. 6) has a construction consisting of four in each 1 corner; its type with an opening angle of 9О and a sheet spatial lattice. Each subsequent plate 6 of the lattice adjoins to two in itself 1, combined by the previous plate 6, and one The new billet can also have bends and perforations.The two mutually intertwined curved sheet grids (Fig. 7), which are joined together by four, form a building element with a double spatial grid (Fig. eight). In the considered linear building elements, ca (vegvi) mainly perceive bending moments and normal forces. The lattice mainly perceives transverse forces and torques. The technical and economic efficiency of the design is provided by improving the manufacturability of its manufacture and reducing the material consumption due to the spatial work of the sheet grating, reducing the number of element sizes to a minimum, the absence of auxiliary structural elements (stiffness diaphragm), the possibility of using high-performance electrocontact welding of the lattice joints to themselves. Claims of the invention Linear construction element of a multi-faceted cross-section. Including it, combined with a spatial lattice made of a sheet blank, characterized in that, in order to improve the manufacturability and reduce material consumption, the sheet blank is made with parallel longitudinal edges and is bent in successively in opposite directions. x along the lines mutually intersecting at an angle, with the angular zones of the bend of the workpiece aligned with themselves. Sources of information taken into account in the examination 1. US patent number 3296767, cl. 52 - 634, published. 1967. 2. US patent number 2446457, SP. 52-534, publ. 1948 (prototype). ff Iv t TO / Fig