What is the roll roll forming machine? (Serial) 3

    Cold-formed steel sections corner portion of the material to plastic deformation occurs due to the bending cold work hardening, which increase strength, ductility decreased, a phenomenon known as cold bending effects. If the effect of the use of cold-formed after improving strength component design, it can save 10% to 15% of the steel, but also as a means to improve the strength of cold-formed steel safety reserves.

What is the roll roll forming machine? (Serial) 2

        Bending deformation zone roll cold molding cross section, curved pieces of the outer fiber elongation by Ramen, the inner fiber pressure and shortened between the two regions shortening and elongation, there is a layer of fibers of constant length called neutral layer, which in cross section form an arc called the neutral line. Since the outer layer of a pressure strain into a pull, it is likely to cause thinning deformation, the inner layer of compressive strain, is not conducive to plastic flow, coupled with the rigid contact bump forming rolls round, so that the metal nowhere to flow, but to make the inner layer shift, thus the thickness of the bent portion thinning, thinning amount is generally small.

      In determining the thickness and width of the blank that: before and after molding strip thickness change, expand each part after forming (line) and neutral line length equal to the width of the blank.

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What is the roll roll forming machine? 1

       
        Roll cold forming is followed by Dangdang metal strip when the number of hole-type roller, with rotating plate with rollers feed forward while being continuously curved, so that the desired cross-sectional shape of the system member. Visible, roll forming is a continuous curved molding method. Figure 2 is molded in a second case of Figure 1 for different sections of the plate belt rollers. Strip at the entrance rollers began to produce bending deformation, and at the same time moved forward, in the center of the section of the roller 4, the end of the forming of the second pair of rollers in and out the roller, and then enter The third pair of rollers.
       Roll cold forming (Cold Roll Forming) is a plate with a total length of successively pass through a number of different local and gradually bending deformation, the whole cross-sectional shape gradually approaching the finished cross-sectional shape, and ultimately get the full-length plastic working method of uniform cross-section of product . Pass is made of two or more having a certain shape forming roll (also known as roller, roller) outline enclosed, forming rolls may be horizontal or vertical roll roll. Hole is one of the important factors affecting product quality and productivity. Forming rolls mounted on the frame, is responsible for driving the strip along the forming roll by a motor driven by the transmission system, generally only horizontal roller to active roll, vertical roll are often passive roll. Each stand called a molding machine, each frame molding machine is equipped with two or more forming rolls, each unit consists of two or more columns forming a molding machine.

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Roll Forming Machine Process

        Profile roll forming machine similar bending step in the process, it is not a pure rolling process, but special production methods. Produced by this method profile wall is thin, low weight, but stiffness, shape is very complex, big length. The main production equipment is cold-formed profiles roll forming unit, a variety of its classification. Molding machine according to the production of products can be divided into sections forming machines and welded tube forming machine; can be divided according to type of cantilever frame forming machines and gantry machine; press forming mechanism made separable roll forming machine, roll forming machine and crawler molding machine.

        Currently used by manufacturers of cold-formed profiles molding machine, in addition to wide corrugated board unit and in recent years the introduction of a small amount of the molding machine, the vast majority of the unit or by using ERW converted. This machine generally consists of horizontal and vertical roll roll stand rack. Molding process by molding the order blank edging strip can be divided into stages (Ⅰ), the central portion of the strip forming stage (Ⅱ above) and closed pore stage (Ⅲ above).

        Horizontal roller is gearing frame, bear the primary task tube deformation. Edger is passive, set up in groups of two horizontal rollers occasionally set up, the main role is to guide, it is also involved in part of the deformation, deformation of the strip and prevent rebound.

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Stainless steel broad application prospects in the construction industry


     Up to 319 meters on the Chrysler Building in New York 56-meter-high giant spire is made of stainless steel Outokumpu, and after the completion of 80 years had only received two maintenance over New York still gleaming like new. Today, stainless steel durability, functionality and aesthetics have been perceived by the world's architects and favor, it is widely used as a cladding material. In the future is the construction sector, the stainless steel will release more application potential. And now the plant, houses houses built are mostly made of stainless steel keel structures, simple, quick, because the stainless steel keel own characteristics significantly, both in the external walls of buildings, or industrial, commercial plays an important role, but also because we all stainless steel keel The wide range of applications, so the requirements for the processing of stainless steel keel, keel roll forming machine also requires higher and higher, roll forming machine, only in the constant optimization process can be processed a more high-quality products keel.


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Stainless steel keel product will create a new era of building applications

        As we all know the benefits of high-rise buildings, and stainless steel in construction applications are not uncommon. However, how to expand the scope of application of stainless steel as a building material, especially in the ultra-high-rise buildings, is still a difficult and complex issue. Because it involves not only the scientific theory of knowledge, but also to meet the challenges of the operability and other aspects.
         Experience Day in the global stainless steel leader Outokumpu recently held in Berlin, the construction industry-related person in charge of the reporter interviewed Dr. Outokumpu construction sector Joern Teipel. From the perspective of a physicist and his material experts, with everyone to explore the importance of the stainless steel material for the industry, as well as future trends in this area.
         Joern Teipel said: "I have always been very interested in the construction industry, considered a building fan, history of architecture and its evolution to a strong interest in every new city, I will go to explore and enjoy a wide range of construction. And this is my great pleasure to travel in one. "During the PhD, his research interests are physics, mainly in the non-linear object, relates to an optical detection, optical appearance, optical reflectance surface treatment, and these subjects field of knowledge is important for building. Dr. Joern Teipel said: "The content is not strange for me based on professional education background, I can easily grasp the material in the building to find the perfect combination of a number of choices in this study experience for me. career choice and development have had a significant impact.
         Meanwhile, Dr. Joern Teipel said: "For material suppliers, the most important task is to determine what is really needed is an architect, and we should learn how to meet their needs Outokumpu's stainless steel both beautiful and. lasting properties, it can effectively help architects achieve their vision. Our responsibility is to make the architect's dream become a reality. "
          Development of the construction industry depends on the development of engineering works not only to learn, but also depends on the progress of materials science, mechanical engineering, energy and power engineering, electronics, communications, automation, computer science and other related disciplines. If the architect is a dreamer, so materials science and other engineering scientists is their "Dream man." Dr. Joern Teipel said in an interview, in the construction industry, "the architect of the exterior walls if there is some special design ideas, we can help achieve, will be considered together with all the possible combinations, we have a total of 70 different surface and polished product portfolio, which has a relatively large number of. "
    The future of stainless steel products, especially stainless steel keel into a large number of products will be put into our daily lives and the construction industry, stainless keel products will be favored for the construction industry.

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Cold-formed steel roll forming machine processing product defects and causes?

 First, cold-formed steel finished weld cracking or rupture
         Reason: 1, the thickness of the width of the raw material in the production process is unstable. Weld or produce false welding; 2, extrusion welding inadequate, poor weld fusion.

         Second, cold-formed steel products do not meet the criteria bend
         Reason: 1, pipe wall thickness unevenness (uneven thickness or raw material produced by the manufacturer); 2, roll diameter of different pipe deformation leads to uneven bending.

         Third, cold-formed steel product size fluctuations
         Reason: 1, the operation when adjusting the roll improper; 2, solid too fast, leading to size fluctuations.

         Fourth, cold-formed steel products sectional serious glitch, have a "rat tail"
         Reason: 1, cutting blades become blunt, so the gap is too large tends to remain; dull blade, or improper installation also easily lead burrs; 2, pipe welds have squeeze out excess metal. Welding system is not standardized and easier to make the cut when leaving burrs.

         Fifth, cold-formed steel products weld surface is not flat, convex clear
         Reason: 1, convex weld, the weld planing depth darker, resulting in lower flatness. 2, concave weld, the weld planing depth shallower.

         Six, cold-formed steel products square tube or rectangular tube R angle fluctuation
         Cause: Improper production operations

         Seven, then welded tube body phenomenon exists
         Reason: In the production process, the raw material is carried unwinding package rolling, each volume of raw materials without the interface, in order to continuous production, the need to end of the first two volumes of raw materials welded.

         Eight, the port saw irregular, tilted or uneven.
         Cause: shear deformation in shear makes port missing.

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