Bent channel DERZHSTANDART 8278 83 designations.

submit Golovna According to the width of the police, the bent channel is divided into equal and uneven. This standard is expanding to bent steel flat channels

, which are made from cold-rolled and hot-rolled steel of primary core, carbon-clay and low-alloyed construction. Bent channel vibrating on roll forming mills from rolls.

For the accuracy of profiling, in accordance with regulatory documents,.

channel is being prepared

different rolling precision: high precision – A, advanced – B, extreme precision – B. Indicators of technical level for this GOST transfer for the highest and first categories of quality. The strength of a hot-rolled channel versus a bent one

The bent steel channel is a U-like cut, like hot-rolled, but has more rounded outer cuts, more accurate dimensions. because During production, defects appear in the product.

The bending channel is widely available in our warehouses in the Moscow region (Lobnya, Elektrovugilla), in the cities of Orel, Bilgorod, Nizhny Novgorod, Voronezh, Kursk, Saratov, Samara, Kazan, Ulyanovsk, Rostov-on-Don, Krasnodar, Pyatigorsk, Novocherkassk, Cherepovets, Novotitarivska station.

Near Rostov-on-Don and Kursk metro station, bent channels are carried out to the size of the frame. The thickness of the wall of the bent channel we rolled should be 2.5 - 6 mm, height: 40 - 250 mm, width of the beam: 32 -125 mm. Table of channels GOST 8278-83. Assortment of bent channels

a

b

s

• Buy a bending channel
• Steel straight-flange bent channels are produced according to the standards of GOST 8278-83.
• The standard established by the country defines all the parameters that are determined during the production of products.

Viruses vibrate from the curing of profile bending benches from several types of primary steel:

hot-rolled;

roll;

1. cold rolled.
2. Channels are manufactured according to GOST requirements from structural, carbon or low-alloy steel.
3. The national standard establishes technical indicators that are included in the first, highest category of capacity.

Classification of viruses

Products are classified according to the accuracy of profiling into three categories:

"A" - temple.

The parameters that determine the technical characteristics of the product are determined as much as possible at a 90° angle.

Virobniks produce wedge channels no more than 11.8 m and no less than 3 meters.

It is important to prepare the product from a gentle source, but each batch is allowed to have some small particles in the amount that does not exceed 7% of the mass of the batch.

The products that are produced show a mild, double-drying state, but in 7% of the salt mass there may be present non-mild particles.

If your partner determines the length of the wall, then you can prepare channels that reach a length of 12 meters.

Viruses can be mothers of healing, which can be maintained until the end of the day as a multiple, as well as peacefully, indicated in table No. 5.

The channels can be twisted around the axis in the later plane, but this indicator cannot be greater than the “G” for the dovzhina viroba, which is measured in meters.

Proteus may exceed 10°.
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
The procedure must be organized in accordance with the standards, which must be based on the level of accuracy and distance between the ends.
If the required channels are of high precision profiling, then the height cannot be less than 80 mm.
If it is necessary to move, this parameter is within 100 mm.

If the accuracy is standard, then the distance becomes 200 mm. When preparing channels, the height is determined at the plane with the alignment of the face, which can be leveled from the outer radius, so that the curvature is reduced. How to break a bent channel:

Channel with deformed internal edges police - series U.

12U Controls virus parameters

14U

Small
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
The procedure must be organized in accordance with the standards, which must be based on the level of accuracy and distance between the ends.
If it is necessary to move, this parameter is within 100 mm.
Channel with parallel edges - series P according to GOST 8240-97.

r – radius of rounded lines.

12U Controls virus parameters 40P

calculated according to the nominal dimensions with a material density of 7850 kg/m3 and a sub-dimension value.

Economical channel bar - Ege series..
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
The procedure must be organized in accordance with the standards, which must be based on the level of accuracy and distance between the ends.
Small
If it is necessary to move, this parameter is within 100 mm.
Channel with parallel edges - series P according to GOST 8240-97.

Economical channel – series E according to GOST 8240-97

12U Controls virus parameters 40P

33E

36E.
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
The procedure must be organized in accordance with the standards, which must be based on the level of accuracy and distance between the ends.
Small
If it is necessary to move, this parameter is within 100 mm.
40E

Light channel – L series.

12U Controls virus parameters 40P

20L

22L
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
The procedure must be organized in accordance with the standards, which must be based on the level of accuracy and distance between the ends.
Small
If it is necessary to move, this parameter is within 100 mm.
Channel with parallel edges - series P according to GOST 8240-97.

24L

20Sat Controls virus parameters 24C
26C Controls virus parameters 26Ca 30C * 30Ca 30Sat

Note: 1. Masa 1 m

calculated according to the nominal dimensions with a material density of 7850 kg/m3 and a sub-dimension value.
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
2. * Geometric dimensions
It is important to add rules for controlling dimensions in order to maintain cross-section and twisting, as well as curvature.
30C to

GOST 8240-97

Bending channel according to GOST 8278-83.

S – police community;

Table.

The size is a mass of bent channels made of boiled carbon and alloy steel.

h, mm
Initially, the curvature of the product is important, so the growers do not allow the value to be more than 0.1% of the final yield of the virus.
The police slackness within one meter is no more than 2 mm, in compliance with government standards. Controls virus parameters;
b, mm
2. * Geometric dimensions
S, mm
R, no more, mm

Note: The weight of 1 m profile is calculated according to the nominal dimensions with a material thickness of 7850 kg/m3 and is a sub-standard value.

* – There is a huge mass of bent channels made of mild carbon and low-alloy steel.
Notes: 1. The weight of 1 m of channel is calculated according to the nominal dimensions with a material thickness of 7850 kg/m3 and is an additional value.
2. R1=R+2 mm.

Table 28. Dimensions and weight of bent channels of low-alloy carbon steel and low-alloy steel with a time-bearing strength of over 460 N/mm2.

* – There is a huge mass of bent channels made of mild carbon and low-alloy steel., marked with a star, are prepared for the benefit of the living.

Notes: 1. Masa 1 m Controls virus parameters 40P

MІZH G O S U D A R S T V E N N I Y S T A N D A R T

CHWELLERY STEEL BENDS
Assortment

Steel roll-formed equal channels.

Dimensions

Date of entry: 01/01/84

1. This standard is expanded on bent steel straight-flange channels, which are produced on profile bending mills with cold-rolled and hot-rolled steel, coiled steel, carbon-jar construction and low-legged. Indicators of a technical level, established by this standard, are transferred to the highest and first categories of capacity.

(Changed edition, Issue No. 1, 2).

la.
For the accuracy of profiling, the channels are prepared:
high accuracy – A;

increased accuracy – B; extreme accuracy - Art.

The possibilities of high and enhanced profiling accuracy indicate a higher category of grading.

(Zaprovadzheno dodatkovo, Zm. No. 1). 2. The reversal of the channels is subject to the same as indicated on the chair. h- wall height; b- police width; s - channel quality;- R- radius of curvature; W moment support; I - moment of inertia; i -Radius of inertia; Sx - Static moment napivtinu, x 0 -

stand up to the axis

y - y
to the outer surface of the wall;

- Relation of the rozrakhunkovogo visu of the police to the tovshchina of the channel;

Bent channel GOST 8278-83 has a P-like cross-cut (C-like cross-cut shape) of different sizes and 1 meter of linear channel.

Bent profiles are prepared either from rolled hot-rolled carbon steel or from carbon structural yak and low-alloy steel.

To prepare a channel bent into a box (div. photo), the manufacturing plants use a special roll-forming workbench for bending the metal profile.

Level channel GOST 8278-83 is used for the production of metal frames from a bent profile, partitions, etc.

All channels work well to ensure maximum axial strength, which increases the value of the design and other technical characteristics.

Types of channel are divided according to the width of the profile, its dimensions can vary between 32-115 millimeters (high-profile profile and wide-flange profile).

The height of the channel can be changed between 50 and 400 millimeters.

This high demand is due to the great relationship between the feedstock of the cold-formed channel, physical and mechanical forces (values ​​and others) and the very dimensions of the transverse section.

Cold-formed channel of sizes 10, 12, 14, 16, 20 is actively used in industrial and civil everyday life when replacing hot-rolled rolled channel through the feed with thin strips (with a steel sheet), for reinforcement of concrete structures shares, during production of wagons, in automobile production industry, for the production of bridges, light covering and thin-walled columns, as well as in other galuzes of the people's rule.

In everyday life, the assortment of cold-formed channels can be used in production fittings for industrial protection, in monolithic structures, frame structures, for building fences, gatherings, canopies and other metal structures of varying complexity i.

If the bent channel is made from carbon-fiber or oxide (primary core or structural core), then the bending radius should be no more than 4 mm.

If the vikorist is low-legged or calm, the radius is no more than 7 mm.

Through this area of ​​the transverse cut and, as a result, the pit (weight of 1 linear meter) of bent channels made from the first and other types of steels are cut.

Also in a small way, they do not avoid other characteristics that are determined during engineering and design developments, such as: moments of inertia and support, static moment of transverse gravity, distances from the axes of inertia to external surfaces of the vibration, radius of inertia and others.
The assortment of channel GOST 8278-83 includes a great variety of standard sizes (numbers), the number of which exceeds dozens of names.
When choosing a lightweight assortment, take into account the first purpose, in accordance with GOST, choose the standard size of the channel with basic parameters, such as the height of the profile, the length and distance between the edges of the police, the theoretical value 1 linear meter of channel.

The same assortment of bent profiles is divided into beams by length (rolled metal of standard, multiple and non-standard age).

The standard length of a bent profile can be 2-12 m; for individual design, a beam with a length of more than 12 m can be prepared. The length of the edged sheet is the price of the largest length of a smartly visted rod with ends perpendicular to the ends zhnoy axis.

The length of the bent channel can be changed depending on its dimensions.

In the table presented, the weight of 1 meter of linear bent channel, the spread of theoretic value is provided for the different heights of the walls and the height of the police.

The supply of a U-like profile starts from 1 kg per 1 meter and can reach 11 kg for a 170 cold-formed profile, for which a very wide range of sizes and values ​​of curved channel is created.