经济的提升，促进了建筑行业的不断进步。我们都知道在建筑行业中，钢材的种类，根据不同的需求，自然也有所不一样，方管也不例外。可能还有朋友对方管了解的并不是很多，接下来就由济南方管的小编来为您讲一讲方管是怎么形成的吧：

The improvement of economy promotes the continuous progress of the construction industry. We all know that in the construction industry, the types of steel are different according to different needs, and the square tube is no exception. Maybe there are some friends who don't know much about Fangguan. Next, let's talk about how Fangguan came into being

一、实弯

1、 Solid bend

实弯，望文生义是压实了弯折，实弯时里外辊与管坯里外壁双向压实。

In the actual bending process, the inner and outer rollers and the inner and outer walls of the tube blank are compacted in both directions.

(1)实弯的长处是弹起小，成型精 确，并且只需辊型精 确，内角成型的R比拟精 确。

(1) The advantages of real bending are small bounce, precise forming, precise roll shape, and precise r-analogy of internal angle forming.

(2)实弯的缺欠是有拉伸/减薄效应。实弯会使弯折处发生拉伸，拉伸效应使弯折线纵向的长短延长;实弯弯折处金属会因拉伸而变薄。

(2) The imperfection of real bending is tensile / thinning effect. The real bending will make the bending place stretch, and the stretching effect will make the length of the bending line lengthen; The metal at the real bend will be thinned by stretching.

二、空弯

2、 Empty bend

空弯是经过外辊与管坯外壁的单向接触构成弯矩使带料弯折，空弯会使弯折线发生紧缩，紧缩效应使弯折线纵向扩大，弯折处非金属涌现沉积变厚，这就是空弯的紧缩/增厚效应。

Empty bending is the bending moment formed by the one-way contact between the outer roll and the outer wall of the tube blank, which makes the strip bend. Empty bending will make the bending line shrink, the contraction effect will make the bending line expand longitudinally, and the non-metal deposition at the bending place will become thicker. This is the contraction / thickening effect of empty bending.

空弯的长处是能够正在无法进行实弯时进行边长的弯折，比方方矩管的上边/侧边同步弯折和精整。空弯还能够弯折R<0.2t的外角而没有致管壁发作折断。

The advantage of empty bending is that it can bend the side length when the real bending cannot be carried out, such as synchronous bending and finishing of the top / side of rectangular tube. The outer corner with R < 0.2T can be bent without breaking the tube wall.