SU1251984A1 - Fluted sheet - Google Patents

Description

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The invention relates to rolling production, in particular to the manufacture of corrugated sheets used in mechanical engineering and construction.

The purpose of the invention is to reduce the metal capacity while maintaining the carrying capacity of the corrugated sheet.

FIG. 1 shows a corrugated sheet, top view; in fig. 2 shows sections A-A and B-B in FIG. one.

The corrugated sheet contains a base 1 with corrugations 2, and the base is made in the form of a periodic profile of variable thickness. the width and length, and consists of uniformly alternating wedge-shaped sections with a monotonously increasing and decreasing wedge shape, which are conjugated so that the base has a mirror symmetry in the longitudinal and transverse directions.

Adjacent areas are cells 3 with an increasing and decreasing wedge shape and are outlined by a circle with a radius equal to

R h e ° - “where h is the maximum thickness of the core

vani;

e is the base of the natural logarithm.

The maximum thickness of the base is 1.2-2.0 mm of its minimum thickness.

With

thickness ratio

h

2 dl

to obtain a wedge shape, rolling with relative reductions of more than 50% will have to be done, which will require very hard rolling stands, and the rolling process itself will be unnecessarily energy-intensive. When the ratio

B

1.2 the resulting profile will not be

to have a given metal consumption, and the metal savings achieved will not compensate for the cost of manufacturing a working tool.

Corrugated made in the form of truncated cones.

The economy of the metal of the proposed corrugated sheet is determined by the ratio of the geometrical parameters of each cell.

The corrugated sheet is used as follows.

The corrugated sheet is installed at the connection and the perimeter of the metal frame.

When a force is applied to a sheet, each of its cells begins to work in bending. Allowable stresses are determined by the type of material and the nature of the applied loads.

The frictional properties of the product are determined by grooves applied to the surface of the sheet.

The economic effect of using the present invention is to reduce the metal consumption by 8-12%.

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Editor E. Papp

FIG. 2

Compiled Y. mov

Tehred E. Chizhmar Proof-reader L. Pilipenko

Order 4562/9 Circulation 518 Subscription VNIIGSh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (3)

1. A corrugated sheet containing corrugated base, characterized in that, in order to reduce the metal consumption while maintaining its bearing capacity, the base is made in the form of a periodic profile of variable thickness in width and length and consists of uniformly alternating wedge-shaped sections with monotonously increasing and decreasing wedge-shaped interconnected so that the base has mirror symmetry in the longitudinal and transverse directions. 2. Sheet pop. 1, characterized in that the maximum thickness of the base is 1.2-2.0 of its minimum thickness. 3. Sheet pop. 1, with the fact that adjacent sections with increasing and decreasing wedges are outlined by a contour of a circle whose radius is R =] - | _e O, O “h'-1.85, η where h, is the maximum thickness of the base; e is the base of the natural logarithm. SU .1251984