Have you ever seen a potter make pottery? On the rapidly spinning rolling machine, the artisan potter applies a little pressure here and gently pulls there. The clay that was originally collapsed into a ball appears to be alive, constantly changing shape with the hands of the artisan.
Do you believe that cold, hard steel can flow like clay and shape itself freely? I’m not lying to you. If you don’t believe me, just watch the introductory video——
And this? As the video says, this process is so fascinating! In order to find out the secret behind this, some friends watched this video 10,086 times. No matter how many times I watch it, I can’t find the “flaws” in it and I can’t break our “magic”. Because it is not “magic” in itself, but the spinning machines of the German companies ThyssenKrupp, WF, Leifeld, etc. feature a technology called hot flow forming.
As you can see from the video, heated spinning technology has a similar principle to the ceramic casting method, except that the material made changes from clay to steel. So how does hard steel become soft and fluid? Let us reveal it to you.
During the heating and spinning process, all materials are subject to strict requirements. Only high-strength hot-rolled steel can withstand high temperature melting and reshaping. Firstly, we make the high-strength hot-rolled steel into disc, tube or cup shape blanks and fix them on the mold of the spinning machine. It is almost the same process as collecting clay into pottery.
During the heating spinning process, the workpiece rotates with the machine spindle. Then, two rotating wheels which replace the potter’s hands press the blank. They push selected parts of the blank, melt them at high temperature and press them against the main axis. Such high pressure and temperature cause the flow effect of high strength hot rolled steel. Our blank is like clay, obediently stretched along the axis under the pressure of the rotating wheel, and finally becomes a symmetrical shape covering the surface of the central part. axis, steel products with different wall thicknesses and complex shapes.
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In this process, the precision of the rotating wheel is much better than that of the craftsman’s hand, and we can also obtain high-precision products under precise control. This new technology is now closely associated with the automotive industry. As we all know, energy saving and emission reduction have become an important development direction of today’s automobile industry, and weight reduction is an important means to achieve this goal. ThyssenKrupp’s hot-spinning technology uses lightweight, high-strength hot-rolled steel materials and precise control of sheet thickness, making it the most cost-effective lightweight solution in the industry. Currently, hot spinning technology is mainly used in the manufacturing of automobile wheels and transmission systems. To transmit engine power to the wheels, cars need rotating parts that are particularly resistant to wear. Traditional forging and casting can provide such parts, but the hot spinning process provides components up to 50% lighter than traditional processes, reducing load. weight of components. Reduction of carbon dioxide emissions.
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