With the development of domestic economic construction, especially in the construction industry, the wide use of square and rectangular pipes has also increased. With the increasing use of square and rectangular pipes, their performance has also put forward strict requirements. At present, the main manufacturers usually have two ways. The standard of tube forming is bending. What is square tube? Forming of rectangular pipes is usually called bending, which is a method of bending. However, in square steel pipe industry, it will be classified as true bending and empty bending. 其實(shí)，不用說，大家都知道，其實(shí)彎曲的過程中，方管矩壓縮產(chǎn)生彎曲變形的現(xiàn)象，而內(nèi)部和外部的方形和矩形管，雙向真正的壓力狀態(tài)輥的內(nèi)壁但是，必須根據(jù)專業(yè)人士，真正的彎曲的主要優(yōu)點(diǎn)是相對(duì)較小的反彈，并在成形時(shí)，是非常準(zhǔn)確的，在其輥型的數(shù)據(jù)，一般內(nèi)角成型和更準(zhǔn)確的準(zhǔn)確。然而，這兩種方法有一個(gè)缺點(diǎn)，就是矩形管彎曲出現(xiàn)在真實(shí)的，有可以伸縮，減少出現(xiàn)一般拉伸長度和厚度。然而，空彎的過程中，是彎曲矩形管壓縮的行，并產(chǎn)生后的彎折線將被拉長的長度，和空彎產(chǎn)生增稠效果。這種方法的優(yōu)點(diǎn)是，無論內(nèi)角小于R彎曲，永遠(yuǎn)不會(huì)產(chǎn)生壁破損，缺點(diǎn)是，由于在同一時(shí)間從向上和向下的壓力，成型力將超過負(fù)載，和將影響管長方使用。但是，在實(shí)際使用中盡可能的時(shí)候，盡量安排，并在施工過程中選擇合適的地點(diǎn)和正確的操作。
In fact, it goes without saying that in the process of bending, square tube moment compression produces bending deformation, while inside and outside square and rectangular tube, the inner wall of two-way real pressure state roll, but according to professionals, the main advantage of true bending is relatively small rebound, and when forming, it is very accurate, in its roll shape data. Generally, the inner angle is formed more accurately and accurately. However, one disadvantage of these two methods is that the bending of rectangular tubes occurs in reality, and can be stretched to reduce the appearance of general stretching length and thickness. However, in the process of empty bending, it is the compressed line of the bending rectangular pipe, and the resulting bending line will be lengthened, and the empty bending will produce thickening effect. The advantage of this method is that no matter the inner angle is less than R bending, the wall will never be damaged. The disadvantage is that because of the pressure from up to down at the same time, the forming force will exceed the load and will affect the rectangular use of the tube. However, in the actual use as far as possible, try to arrange, and in the construction process to choose the appropriate location and correct operation.
