橢圓管加工常用方法1.鍛壓法：用型鍛機將橢圓管端部或一部分予以沖伸，使外徑減少，常用型鍛機有旋轉式、連桿式、滾輪式。2.沖壓法：在沖床上用帶錐度的芯子將橢圓管端擴到要求的尺寸和形狀。3.滾輪法：在管內放置芯子，外周用滾輪推壓，用于圓緣加工。4.滾軋法：一般不用芯軸，適合于厚壁管內側圓緣。

Common methods of elliptical tube processing 1. Forging: Elliptical tube end or part is stretched by a forging machine to reduce the outer diameter. Common forging machines include rotary, connecting rod and roller type. 2. Stamping method: The elliptical tube end is expanded to the required size and shape with a tapered core on the punch press. 3. Roller method: the core is placed in the tube, and the outer part is pushed by the roller for the edge processing. 4. Rolling method: generally without mandrel, suitable for thick-walled tube inside and outside the circular edge. 5.彎曲成形法：有三種方法較為常用，一種方法叫伸展法，另一種方法叫沖壓法，第三種滾輪法，有3-4個輥，兩個固定輥，一個調整輥，調整固定輥距，成品管件就是彎曲的。6.鼓脹法：一種是在管內放置橡膠，上方用沖子壓縮，使管子凸出成形;另一種方法是液壓鼓脹成形，在管子中部充入液體，液體壓力把橢圓管鼓成所需要的形狀，波紋橢圓管的生產大部分用的是這種方法。

5. Bending forming method: There are three commonly used methods, one is called stretching method, the other is stamping method, the third is roller method, there are 3-4 rollers, two fixed rollers, one adjusting roll, adjusting the fixed roll distance, the finished pipe is bent. 6. Bulging method: one is to place rubber in the tube and compress it with a punch on the top to make the tube bulge; the other is to fill the middle of the tube with liquid, and the liquid pressure makes the elliptical tube bulge into the desired shape. This method is mostly used in the production of corrugated elliptical tubes.