White iron sheet processing is a widely used material in the market in recent years. Because of its unique product performance, it is loved by everyone.

通風管道公司指出白口鐵皮加工的產品一般用于管道安裝，比如我們常見的餐廳用來排油煙的通風管，還有一些供水管。因為白口鐵加工的產品防銹、抗氧化、經濟，所以很多管道都是白口鐵施工的。

The ventilation pipe company pointed out that the products processed by white iron sheet are generally used for pipe installation, such as the ventilation pipe used to exhaust oil smoke in our common restaurants, and some water supply pipes. Because the products processed by white iron are rust-proof, anti-oxidation and economical, many pipes are constructed by white iron.

由于白口鐵皮加工產品中含有鋅，而鋅離子是一種比較活潑的金屬離子，白口鐵皮加工產品表面的鋅離子在與空氣或水、化學品接觸時，能有效地保護內部的鐵和產品的質量。而且白口鐵產品表面光亮，可用于管道通風設施的安裝，不僅具有美觀的裝飾效果，在實用性能上也比其他材料更具性價比。尤其是水。鐵皮加工廠家對于一些供水管道，白口鐵產品可以有效防止腐蝕，所以水質可以得到保證。

Because the processed products of white iron sheet contain zinc, and zinc ion is a relatively active metal ion, the zinc ion on the surface of the processed products of white iron sheet can effectively protect the internal iron and product quality when contacting with air, water and chemicals. Moreover, the surface of white iron products is bright, which can be used for the installation of pipeline ventilation facilities. It not only has beautiful decorative effects, but also has more cost-effective performance than other materials. Especially water. For some water supply pipes, the iron sheet processing factory can effectively prevent corrosion with white iron products, so the water quality can be guaranteed.

但其實白口鐵皮加工的生產工藝都差不多，只是在后期的服務和過程質量控制上。太便宜的白口鐵皮加工出來的產品質量肯定略差，所以在選擇白口鐵加工出來的產品時，一定要注意不要比價，要先看產品質量。

But in fact, the production process of white iron sheet processing is similar, only in the late service and process quality control. The quality of the products processed from too cheap white iron sheet must be slightly poor, so when selecting the products processed from white iron sheet, we must pay attention not to compare prices, but to see the product quality first.

根據實際尺寸畫出肘部的側面投影。包括接縫線。

First, draw the side projection of the elbow according to the actual size. Including suture.

第二，鐵皮加工廠將每個封閉的線框圖形用線劃分成獨立的圖形。(可以單獨切割，也可以單獨噴漆。

Second, the iron sheet processing plant divides each closed wireframe figure into independent figures with lines. (It can be cut or painted separately.

取一個圖案，畫在另一張紙上(垂直設置線)。鐵皮加工廠沿著圖案的高度畫兩條上下平行且垂直于線的水平線。長度正好是圖案直徑的周長。(閉合矩形

Take a pattern and draw it on another piece of paper (set the centerline vertically). The iron sheet processing plant draws two horizontal lines parallel to the top and perpendicular to the center line along the height of the pattern. The length is exactly the circumference of the pattern diameter. (Closed rectangle

鐵皮加工廠將圖案的垂直方向分成相等的部分，鐵皮加工廠標記出來，然后將這些平分線垂直畫入剛剛畫出的展開的矩形。注意展開圖上的點必須對應于投影模式上的點。

The iron sheet processing factory divides the vertical direction of the pattern into equal parts, marks them, and then draws these bisectors vertically into the expanded rectangle just drawn. Note that the points on the flat view must correspond to the points on the projection pattern.

沿著水平方向將圖案上的對角線分成相等的部分。并且平行于展開的圖案，并且對應于相應的點。在展開的樣本上獲得的交點的平滑連接是展開的曲線。等分越密，曲線越精確。

Divide the diagonal on the pattern into equal parts along the horizontal direction. It is parallel to the unfolded pattern and corresponds to the corresponding point. The smooth connection of intersections obtained on the unfolded sample is the unfolded curve. The closer the bisection, the more accurate the curve.

六、關于鐵皮加工的咬入量，以及厚薄處理。

6、 The bite amount and thickness of iron sheet processing.

切割白口鑄鐵彎頭時，應知道彎曲半徑、厚度和截面數。鈑金展開圖一般采用相貫線法展開，沒有計算公式。軟件繪圖更方便。

When cutting white cast iron elbow, the bending radius, thickness and section number should be known. The sheet metal unfolding drawing is generally developed by the intersecting line method, and there is no calculation formula. Software drawing is more convenient.