1、 How is the rounded corner of the square tube determined

需要先在方管上確定好圓角位置，并打上標記；接著用尺子計算好彎曲角度，并在方管上確定好;這時候需要根據方管寬度，計算出90度直角的弧形長度，將這個長度也畫在方管上；用切割機沿畫線切割出來，對折彎曲成90度后，用電焊機將重疊位置焊接好即可。

It is necessary to first determine the position of the rounded corner on the square tube and mark it; Next, use a ruler to calculate the bending angle and determine it on the square tube; At this point, it is necessary to calculate the arc length of a 90 degree right angle based on the width of the square tube, and draw this length on the square tube as well; Use a cutting machine to cut along the drawn line, bend it to 90 degrees, and then use an electric welding machine to weld the overlapping position.

二、市面上常見的方管有哪些類型

2、 What are the common types of square tubes on the market

1、按生產工藝分

1. Divided by production process

反觀在建筑行業中是應用是非常廣泛的，根據不同區域的使用特性，可以采用不同工藝生產出來的方管，譬如說有熱軋工藝的無縫方管，冷拔工藝的無縫方管，擠壓工藝制作的無縫方管，以及普通的焊接工藝方管等等。

On the contrary, it is widely used in the construction industry. According to the usage characteristics of different regions, different processes can be used to produce square pipes, such as seamless square pipes with hot rolling process, seamless square pipes with cold drawing process, seamless square pipes made with extrusion process, and the most common welding process square pipes.

2、按焊接方式為

2. According to the welding method

市面上焊接方管是普遍的，它有電焊、氣焊兩種工藝，其中電焊分為電弧焊方管、電阻焊方管，氣焊的話，也有氣焊、爐焊這兩種工藝的方管，此外，還有焊縫工藝，即直縫焊、螺旋焊這兩種。

It is the most common to weld square tubes on the market. There are two processes: electric welding and gas welding. Electric welding is divided into Arc welding square tubes and Electric resistance welding square tubes. For gas welding, there are also gas welding and furnace welding square tubes. In addition, there are welding processes, namely straight seam welding and spiral welding.

3、按斷面形狀分

3. Divided by section shape

有簡單和復雜兩種斷面類型，其中簡單的有方形和矩形兩種方管，而復雜斷面方管就比較多了，不僅有花形、開口形、波紋形的，還有各種異型的。

There are two types of cross sections: simple and complex, with simple square and rectangular square tubes. There are more complex cross section square tubes, including not only flower shaped, open shaped, and corrugated ones, but also various irregular ones.