A good short cut for small pipes and 90° joints ,you have the right principles, just the tech drawing needs development ,if you want to do other angles .there is no getting away from using trigonometry.
Chuẩn rồi , ra công trường thì ống nhỏ cần lấy 4 góc , vẽ tương đương là mối hàn bù thôi , còn ống to thì sợt ứng dụng lấy tỉ lên đo chuẩn hình parapol là cắt , cần gì vẽ cho kì công
Обычно подставляешь трубу и рисуешь на ней отверстие-прожигаешь,потом вставляешь в отверсте вторую трубу и рисуешь контуры основной на вставленной-вытаскиваешь -обрезаешь и свариваешь.
look for a drafting book that shows how to develop sheet metal layouts - it'll handle all this and more. something from the 60's or before likely... I did stuff like this in HS and college.
Brilliant! I think using a chop saw on the angle would be a cleaner cut and leave a little bevel for the weld! Brilliant way to find the angle for different sized pipe thought!
