【Haichuan Explores the World】That’s how round tubes turn into rectangular tubes
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A round tube originally becomes a rectangular tube in this way; through successive rolling steps, it takes on the desired shape.
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Thank you for sharing the information; the forum is even better with you here.
I’m familiar with this :lol It’s most likely seamless pipes; when the quantity is small and the quality requirements are low, this approach can be used. Upon close inspection, his roller is unitary; due to the difference in rotational speed, scratches may appear on the sides. The pipes are also fed one by one, making it difficult to control their straightness. The rectangular tubes used for railway open wagons are formed by cold bending weather-resistant steel strips one by one, then welded using high-frequency induction welding; after that they are straightened, and cut to the desired length with sliding punch shears or flying saws. Many rolls are modular and do not allow any visible scratches.
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