Introduction of cold-formed steel
Cold-formed steel is one of the many varieties of steel, a certain width of strip steel, at room temperature through a set of longitudinally arranged rolls, gradually deformed to achieve the shape of dimensions in line with the requirements of the use of the size, and then by determining the size of the shear into the corresponding length. This product is cold-formed steel. Of course, you can also come with stamping, bending or drawing and other deformation methods to get cold-formed steel. But the roll forming method is suitable for large-volume industrialized production, product quality, processing costs, production efficiency is incomparable to other methods, is currently the main production process of cold-formed steel. If the unit is equipped with welding equipment (such as high-frequency welding, argon arc welding, etc.) can also produce closed section of cold-formed steel.
The difference between cold-formed steel and welded steel pipe is: welded steel pipe is mainly used for the transportation of fluids, such as gas, tap water. Oil, liquefied petroleum gas, steam and so on. Requirements for steel pipe to withstand a certain pressure, while cold-formed steel is used to manufacture structures, under external forces on the section of steel, shape, size and mechanical properties have certain requirements.
Category and application of cold-formed steel
1. Cold-formed steel is classified according to the size specifications to the product thickness and width of the unfolding is divided into large, medium-sized, small, wide four kinds.
(1) large cold-formed steel: product thickness of 6-16mm, product expansion width of 600-2000mm.
(2) medium cold-formed steel: product thickness of 3-6mm, product expansion width of 200-600mm.
(3) small cold-formed steel: product thickness of 1.5-4mm, product expansion width of 30-200mm. 200mm.
(4) wide cold-formed steel: product thickness of 0.5-4mm, product width 700-1600mm.
2. Cold-formed steel according to the shape of the classification can be divided into two categories of open and closed.
(1) general open cold-formed steel with equal and unequal edges of the angle, inside the rolled edge and outside the rolled edge of the angle, equal and unequal edges of the channel, inside the rolled edge or outside the rolled edge of the channel, Z-beam, rolled edge of the Z-beam, the special special-shaped open-end steel, and so on.
(2) closed cold-formed steel is welded closed section of cold-formed steel, according to the shape of round, square, rectangular and shaped.
3. Cold-formed steel according to the use of classification, each industry has different requirements for cold-formed steel, cold-formed steel production plants can meet the different requirements of the industry, the production of a variety of specialized cold-formed steel. Mainly can be listed as follows.
(1) automobile manufacturing cold-formed steel; small buses, most of the shaped open-type steel, such as windows, rain gutters, seat machine pulleys. Most buses with closed square rectangular steel, freight cars, most of the open cold-formed steel; specialized vehicles such as fire trucks, engineering vehicles, most of the square rectangular and shaped cold-formed steel.
(2) Railway vehicles: passenger cars and freight vehicles, most of the special shaped cold-formed steel, for example, cold-formed beam instead of hot-rolled beam. For a long time, open
Car, caravan and tanker chassis used in the beam are hot-rolled steel welding structure, which uses two high 310 hot-rolled steel welded into the beam, due to the use of hot-rolled steel welded structure, which exists in a large weight, welding quality requirements of the high (non-destructive testing) processes, the shortcomings of the overall cost is high. Therefore, the railway sector hopes to develop a whole molding, light weight, high strength, good stiffness of the efficient cold-formed steel instead of hot-rolled B steel welding,. Wuhan Iron and Steel developed a cold-formed beam using hot rolled coil as raw material, through continuous molding to get the whole type of beam. Another example: Qi car group in 1985 developed the end wall cross-band and cap steel side columns with cold-formed steel, in 1993 developed a sharp rectangular tube on the side beams with cold-formed steel, cold-formed steel material 09CuPTiRE-A, yield strength of 295 MPa. Cold-formed steel in China's railroad wagons will be more and more applications.
(3) elevator: lift elevator with hollow guide rail, automatic elevator with structural frame and other shaped components with cold-formed steel
(4) shelves: small supermarket shelves and large warehouse supermarket shelves with cold-formed steel.
(5) transmission towers: focusing on the study of cold-formed steel instead of the traditional hot-rolled steel angle, improve the overall performance of the tower, reduce costs. In the high-voltage long-distance transmission towers, high-strength corrosion-resistant structural steel pipe has been tried around. Communication tower using cold-formed steel manufacturing triangle tower structure is also being developed.
(6) construction machinery: crane lifting arm, support arm, tower crane frame with cold-formed steel
(7) electrical equipment manufacturing industry: electrical cabinets, cable bridges with cold-formed steel
(8) agricultural machinery: tractors, plows, harrows and harvesters with cold-formed steel, cold-formed steel beams for agricultural vehicles.
(9) construction industry: steel structure (beams, columns) maintenance structure, roofing, walls, doors and windows, decoration with cold-formed steel.
(10) furniture: stools, chairs, cabinets, beds and other special cold-formed steel.
Where the use of steel are available to cold-formed steel.
The main features of cold-formed steel
Cold-formed steel is a hot-rolled or cold-rolled strip as a billet by bending and molding of various cross-sectional shape and size of the section made of steel. Cold-formed steel has the following characteristics:
1. The cross-section of economic and reasonable, saving materials. Cold-formed steel cross-section shape can be designed according to the needs of a reasonable structure, the unit weight of the cross-section coefficient is higher than the hot-rolled steel. In the same load, can reduce the weight of components, saving materials. Cold-formed steel for building structures can save metal 38-50% than hot-rolled steel, for agricultural machinery and vehicles can save metal 15-60%. Convenient construction, reduce the overall cost.
2. A wide range of varieties, can be produced with the general hot rolling method is difficult to produce uniform wall thickness, complex cross-section shape of various profiles and a variety of different materials of cold-formed steel.
3. The products have clean surface, good appearance, precise size, and the length can be flexibly adjusted according to the needs of all the supply by the fixed or times the size, improve the utilization rate of the material.
4. The production can also be matched with punching and other processes to meet different needs.
Cold-formed steel manufacturers
Jiangyin Jianhe Steel Products Co.
Introduction of the manufacturer: Jiangyin Jianhe Steel Products Co., Ltd. is a subsidiary branch of Jiangsu BaoLi Heavy Industry Science & Technology Co. The company is a set of design, production, installation as a whole, specializing in the production of light steel, heavy steel, mesh frame structure, color metal tiles, sandwich panels and other new building materials and equipment for the second level of qualification enterprises. And it is also a group member of China Steel Structure Association and has been awarded as a trustworthy enterprise for many times.
Main products: cold-formed steel, square pipe, square rectangular pipe, rectangular pipe, welded pipe, high-frequency welded pipe H-beam and so on.
Botou Qinghui Tile Pressure Machinery Manufacturing Co.
Introduction: Botou Qinghui Tile Pressure Machinery Manufacturing Co., Ltd. is specialized in the production of various types of steel enterprises, since its inception to adhere to the concept of good faith management, in the many years of practical experience and the elaborate design of the relevant experts, the company has gradually developed into a collection of research and development, production, sales, installation, commissioning and to provide color steel molding equipment The company has gradually developed into a modern enterprise integrating research and development, production, sales, installation, commissioning and providing technical consulting of color steel forming equipment, and its products are sold to all over the country and are highly praised by customers. The company always puts the interests of customers in the first place, and with the unified management, so that the products can effectively help customers solve problems.
Main products: square pipe, rectangular pipe, metal cold forming machine, roof tile molding machine, etc..
WUXI XIONG FENG SHAPE STEEL CO.,LTD
Manufacturer Introduction: Wuxi Xiongg Feng Shape Steel Co.,Ltd.is located in the beautiful scenery of the Taihu Lake, north of Shanghai-Nanjing Railway, Beijing-Hangzhou Grand Canal. For a long time, the company has been insisting on the tenet that reputation is fundamental and quality is life. We strictly guarantee the quality of each product and supply on time and in quantity according to customers' requirements. The factory has two large and small four-roller combined cold-formed steel unit, where the wall thickness of 0.5mm ~ 6mm, unfolded in 20mm ~ 500mm of various specifications and shapes and sizes of the open section can be produced, that is to say, according to the customer's needs, customized, and the quality is very good, favored by everyone.
Main products: cold-formed steel, fasteners, standard parts, shaped nuts, stamping parts and so on.