SU1156970A1 - Tank - Google Patents

Abstract

A TANK, having a body made in the form of a shell, connected to edged inner and outer shelves frames, each of which consists of interconnected segments with local cuts at the junction, characterized in that, in order to increase strength by preventing the loss of stability of the frames from shrink welded forces, the segments at the junction are bent to one side in a plane perpendicular to the planes of the frames, and the inner rim flanges are convex in these places. SP (X with

Description

This invention relates to the automotive industry. The known tank truck includes a shell associated with frames and stringers 1. During welding of the shell and welding of frames and stringers to it, as a result of longitudinal and transverse shrinkage of the metal in the welds, as well as deformation of heat-affected zones in the tank construction elements, stress arises from shrinkage forces that can exceed the yield strengths of the material and cause plastic deformation in areas of stress concentration. Tanks, the structural elements of which have undergone such plastic deformations during welding, cannot fully take up the load and are prematurely destroyed during operation. Most sushi, this deficiency manifests itself in tanks made of wrought aluminum alloys. A tank is known in which the frame is a rigid structure and does not have compensating elements, and the connection of curved shell elements functions only during the welding process and does not work during cooling and shrinkage, since it is completely fused. The increase in the mass of the deposited and ostyavayush, its metal increases many times the welding voltage, thereby increasing the stress state of the frame, leading to loss of stability, and, consequently, a decrease in the strength of the reservoir 2. Closest to the proposed technical essence and achievable the result is a tank, which is a shell connected to the frames edged by the inner and outer shelves, each of which is made up of interconnected segments with local cuts in place with unity 3. He also has the disadvantage described above. The purpose of the invention is to increase strength by preventing buckling of shpangouts from shrinking welded forces. The goal is achieved by the fact that in a tank having a body made in the form of a shell connected with frames edged by the inner and outer shelves, each of which consists of interconnected segments with local cuts at the junction, the segments at the junction are bent to one side in the plane perpendicular to the planes of the frames, and the internal edging shelves in these places are made convex. FIG. 1 shows a tank, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows an embodiment of the frame; in fig. 5 shows the node I in FIG. 4. and, the horn 1, mounted on the chassis of the automobile 2, consists of a shell 3 of cylindrical or conical shape, assembled and welded from bent steel or aluminum plates. In cross-section, the tank body has a non-circular shape, as a result of which on the shell 3 there are sections 4 of greatest curvature and sections 5 and 6 with a relatively smaller curvature. Inside the shell 3 at some distance from each other and the end walls of the bottom there are frames 7, consisting of arcuate segments 8, edged along the inner perimeter with an endless shelf 9. At the junction points, the conjugate ends of 10 segments are bent in pairs in one plane and perpendicular to the plane frame 7. The height of these ends is smaller than the rest of the height of the segment 8 and with shell 3 and shelf 9 create gaps 11, which during welding move the ends of the segjMeHTOB relative to shell 3 and the shelf 9. This gap is not met he longer metal thickness to allow free shrinkage edges. Shelf 9 in the area of sections 4 of the greatest curvature has a local bulge 12, which compensates for shrinkage stresses during welding. A local bulge is made by bending by the amount of the deflection boom corresponding to the thickness of the metal. Between themselves, the frames are connected by stringers 13, forming inside the shell a framework structure. When welding the tank and its subsequent cooling in welded grooves and heat-affected zones, forces arise from shrinkage of the material. Since the shrinkage forces are directed along the shell contour, as a result of its curvature, shear stresses arise in it, which in sections 4 cause the contour to move and deform within the elastic limits of the material. When cooled, the closed shell 3 tends to squeeze the frames 7 inside. Curved perpendicular to the plane of the frame 7, the ends 10 that are free from contact with the shell by the presence of gaps 11, along with the increased stability of the pinch segments, allow the deformation to be directed along the bend line, thanks to which maintains the stability of the rest of the pinchbill. The local compensatory bends of the 12 flange flange also contribute to this. 9. The invention allows for detecting unforeseen residual deformations in the hull structure elements - shell, clamps - caused by shrinking welding forces, increasing the degree of compliance of the welded structure and its adaptability to operational loads, increasing the fatigue strength of the structure due to the presence of free elastic sections in the frames that play the role of peculiar dampers, which perceive the action cyclically x operational loads.

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Claims (1)

A TANK having a shell made in the form of a shell connected to frames edged with inner and outer shelves, each of which consists of interconnected segments with local cutouts at the junction, characterized in that, in order to increase strength by preventing loss of stability of the frames from shrinkage welded forces, the segments at the junction are bent to one side in the plane perpendicular to the plane of the frames, and the inner edging shelves in these places are made convex. 1 7 13 s Figure 1 SU „..1156970