High rigidity bent section

FIELD: plastic working of metals, namely shaping metallic sheets for lining walls and ceilings.

SUBSTANCE: section includes lengthwise periodic trapezoidal cross- section corrugations arranged by two rows along width of section and mutually spaced by flat inter-corrugation portions of predetermined size and closed semicircular cross corrugations. Each corrugation passes through mean parts of two lengthwise corrugations normally relative to their axes. Height of all corrugations is the same; width of cross corrugation consists of 0.75 - 0.80 of width of lengthwise corrugation.

EFFECT: lowered metal consumption for making sections.

1 dwg, 1 ex


The invention relates to products obtained by the processing of metals by pressure, and can be used in the manufacture of sheet bent profiles with closed stiffening corrugations.

These profiles obtained by forming on a special mills, usually contain longitudinal recurrent corrugations of various cross-section is trapezoidal, semicircular, triangular, which are located in one or more rows across the width of the profile and are separated by a flat migomobile areas. These areas are additional design details, such as the upright side obseve rail freight wagons.

The range of above profiles (usually referred to as the profiles of a high stiffness - DRI), refer to the technical specifications 14-101-789-99 Profiles steel high stiffness with recurrent corrugations".

Known high hardness, containing recurring closed corrugations, which has a semicircular corrugations have a depth not greater than 0.25 of their width, and triangular and trapezoidal corrugation - depth not more 0,49 horizontal projection of their inclined side faces (see A.S. USSR №1202662, CL 21D 5/06 with prior. from 10.08.84). However, this DRI has insufficient rigidity in the transverse direction and it makes when it is used in the image quality is as lateral obseve freight wagons to apply uprights 16, that increases the intensity of the wagon.

The closest analogue to the declared object is bent high hardness given in the book Mpfservice and other Profiles "high rigidity", Magnitogorsk, House press, 1996, p.77, DRI No. 15-1300 (1350)×2×1725×39,6×3,6 mm

This DRI contains longitudinal, recurrent corrugations arranged in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, and is characterized by the fact that the profile contains 14 of the corrugations with a trapezoidal cross-section. This DRI also possess sufficient transverse rigidity to the above-mentioned negative aspects, which increases the intensity of its products.

The technical task of the present invention is the reduction of metal products using DRI.

For this task, bent DRI containing the longitudinal periodically corrugated trapezoidal cross-section, arranged in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, further comprises a closed semicircular transverse corrugations, each of which passes through the middle of the two longitudinal corrugations and perpendicular to their axes, the height of all of the corrugations are the same, and the width poperechnov the flute 0.75...0,80 from the longitudinal width of the flute and the profile can contain 14 longitudinal and 7 transverse corrugations or 10 longitudinal and 5 transverse corrugations.

The essence of the proposed technical solution is to increase the transverse rigidity DRI due to the location thereon of the transverse corrugations of the optimal size. It allows you to either reduce the thickness of the DRI (when it has a 14 longitudinal corrugations), or to reduce the number of flat Migatronic areas (if there are 10 longitudinal corrugations)that in both cases reduces metal consumption of products (cars) from DRI.

View of the proposed DRI (its part) in the plan shown in the drawing.

Profile length L, width b and thickness S contains longitudinal trapezoidal corrugations 1, arranged in two rows across the width of the profile and symmetrical to its longitudinal axis XX. Each corrugation has a height of hg, the length l and width bt. The distance between the longitudinal axes of the corrugations bgand along the length of the profile of the corrugations separated by equal migomobile plots 2, the length of which is determined by the number of corrugations and the values of L and l.

Perpendicular to the longitudinal axes of the corrugations 1 has a semicircular corrugations 3 with length lpwidth bpand height hg. Corrugations 3 perpendicular to the corrugation of 1 (i.e. YYXX) and cross every two of them in the middle, i.e. the distance of the axis YY from the ends 4 of the longitudinal corrugations is of 0.51.

The radii of places of rounding 5 trapezoidal corrugations, and at the base of the semicircular corrugations equal to r, and the radius of the semicircular Popper is knogo corrugation is equal to R. The value of bp=(0,75...to 0.80)bt. DRI can contain 14 or 10 longitudinal corrugations or, respectively, 7 or 5 transverse corrugations.

During installation of gondolas DRI is installed vertically and in the middle Migatronic sections 2 and end sections 6 profiles are vertical posts, which are attached by welding profiles.

Tests (test DRI on the longitudinal and transverse bending) was carried out at JSC "Magnitogorsk iron and steel works".

With this purpose, DRI, made of steel AND the same cast that had the same thickness (3.6 mm), the height of the trapezoidal corrugations hg=39,6 mm when the width bt=200 mm and length l=1230 mm, were manufactured in two versions: with the presence of transverse semi-circular corrugations and without them, the total number of longitudinal corrugations on the finished DRI also varied 14 and 10. Corrugated sheets were tested in the longitudinal and transverse curves of concentrated load.

Limit value of the permissible load for longitudinal bending was about the same (for the same number of corrugations) for DRI with additional transverse corrugations, and without them. When lateral bending of the proposed profiles was a load of 2.1...2.4 times larger than the famous DRI. When reducing the width of the transverse corrugation to bp=(0,50...to 0.74)btin an individual with whom ucah was observed cracking these corrugations when lateral bending DRI. The increase in the width of the transverse corrugations to bp=(0,81 1,00...) btreduced maximum allowable load at this bend.

The calculations showed that the moment of resistance with respect to axis XX (see drawing) the proposed DRI is greater than in the known 95.6%, which explains the results of experiments. Thus, experimental validation confirmed the acceptability found technical solutions to achieve this goal and its advantage over the known object, is selected as the closest analogue (see above).

A feasibility study conducted in JSC "MMK", showed that the use of the proposed DRI, for example, as a side obseve railway gondola cars will reduce the amount of metal to make them not less than 1.5%. This will reduce the overall weight of the car and increase its capacity.

Specific example

Bent sheet DRI has the form shown in the drawing, and is intended for the upper side obseve freight gondola.

Profile settings:

L=12075 mm; B=1350 mm; S=3.6 mm; lp=1100 mm; l=1722 mm (10 longitudinal corrugations and five lateral); bt=200 mm; bp=0,77·bt=0,77·200=154 mm; hg=39,6 mm R=60 mm; l′=2415 mm, bg=600 mm, b=375 mm, r=26 mm

Profile made of steel 10 HNDP.

1. Bent high hardness, containing longitudinal lane is adicheskii repetitive corrugation of the trapezoidal cross-section, located in two rows across the width of the profile and are separated by a flat migomobile areas of a given size, characterized in that it further comprises a closed semicircular transverse corrugations, each of which passes through the middle of the two longitudinal corrugations and perpendicular to their axes, the height of all of the corrugations are the same, and the width of the transverse flute 0.75...to 0.80 on the width of the longitudinal corrugation.

2. Profile according to claim 1, characterized in that it contains fourteen longitudinal and seven transverse corrugations.

3. Profile according to claim 1, characterized in that it contains ten longitudinal and five transverse corrugations.


Same patents:

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1 ex

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2 dwg

Shape bending mill // 2243841

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