What Is The Method Of Bending The Profile

At present, bending is the most commonly used bending method in China. Most of the equipment used for general mechanical press or hydraulic press, but also some special bending press. The commonly used rolling and bending equipment is the plate winding machine. Three roller plate rolling machine according to three points to determine a round truth, the slab for continuous twists and turns. The three-roller plate winder has two drive rollers and a down roller.

The relative distance between it and the drive roller can be changed by adjusting the position of the lower roller.

Since the beginning of this year, elbow social inventory showed a rapid rise, the end of March reached the highest historical 21.92 million tons.

Because destocking speed is slow, the elbow processing mall constitutes a greater pressure. April is the traditional peak season of elbow consumption, but because steel production adhere to a high level, and demand growth is relatively weak, the contradiction of oversupply in shopping malls intensified, coupled with high inventory, elbow prices continue to fall.

When the profile is pulled and bent, the plate is placed between the driving roller and the pressing roller, and the driving roller exchanges and rolls in the positive and negative directions, so that the plate reciprocates. The plate can be twisted into cylindrical surface, conical surface and hyperboloid with small curvature by adjusting the pressing roller step by step.

One end of the press roller can be raised, which is easy to unload the work piece. There are also four-roller and multi-roller coiling machines, which are used to roll thick plate cylinders, and more than four-roller coiling machines, which use multiple pairs of rollers to gradually twist the welded pipe into a messy surface.

For the tortuous parts requiring higher accuracy, larger length and radius of curvature and smaller transverse scale, they can be stretched and bent on special stretching and bending machines. Bending pipe processing, all the thickness of the plate are subjected to the effect of tensile stress, so only elongation deformation, after unloading rebound caused by small deformation, simple to ensure accuracy.

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